Diverticulosis & Diverticulitis
Red Flags — act before continuing history
| Red flag | Why dangerous | Action |
|---|---|---|
| Peritonism / perforation (guarding, rebound, rigidity) | Hinchey III (purulent peritonitis) or Hinchey IV (faecal peritonitis) from diverticular perforation are life-threatening surgical emergencies. Mortality is 25–40% (40–50% for faecal peritonitis). Peritonism in any patient with diverticular disease is a 999 emergency. | 999 immediately |
| Haemodynamic compromise from PR bleeding | Massive diverticular haemorrhage can cause life-threatening haemodynamic instability. Signs: pallor, tachycardia, hypotension, dizziness on standing. Diverticular haemorrhage is the most common cause of major lower GI bleeding in older patients. | 999; IV access |
| Sepsis features, uncontrolled pain, or unable to tolerate oral intake | Suggests complicated diverticulitis (abscess or worse) needing CT and same-day hospital assessment. No isolated CRP or WBC threshold substitutes for clinical assessment (NG147). | Same-day hospital; CT abdomen |
| Immunocompromised patient (steroids, chemotherapy, biologics) | Immunosuppression masks the classical signs of peritonism and sepsis in diverticulitis. Complicated diverticulitis can present with minimal systemic features in immunocompromised patients. Lower threshold for hospital admission is essential. | Lower threshold for admission; CT urgently |
| Symptoms >6 weeks, change in bowel habit, or weight loss | Diverticulitis does not cause prolonged symptoms without resolution, significant weight loss, or persistent change in bowel habit. These features in the context of diverticular disease must trigger the NG12 colorectal route (FIT first; suspected cancer referral if FIT ≥10 µg Hb/g) — the two conditions frequently coexist. | NG12 colorectal route (FIT first) |
| Pneumaturia or faecaluria | Colovesical fistula from complicated diverticular disease causes air or faeces in the urine, recurrent polymicrobial UTIs, and risk of ascending urosepsis. Requires CT fistulogram and combined urology + colorectal surgery assessment. | Urgent urology + colorectal surgery |
| Palpable abdominal mass | A palpable mass in the left lower quadrant in a patient with diverticular disease may represent a diverticular abscess, phlegmon, or — critically — a sigmoid carcinoma. Both require urgent imaging (CT) and specialist assessment. The mass cannot be attributed to diverticular disease without imaging. | Same-day hospital assessment (CT); NG12 colorectal route if malignancy cannot be excluded |
Safeguarding Considerations
👴 Frail Older Adults
- Frail older adults may not develop classical peritonism even with perforation due to reduced abdominal wall musculature; high index of suspicion required
- Cognitive impairment may mask symptom severity — collateral history from carer is essential
- Malnutrition is common and worsens diverticular disease; nutritional assessment and dietitian referral are essential in frail patients
- Lower threshold for hospital admission and CT imaging in frail older adults with diverticulitis
💊 NSAIDs and Polypharmacy
- Many older patients with diverticular disease take NSAIDs for musculoskeletal pain or antiplatelet agents, both of which significantly increase the risk of diverticular perforation and haemorrhage
- Medication review at every diverticular disease consultation is essential; document NSAID avoidance advice
- Anticoagulant use significantly increases the risk and severity of diverticular haemorrhage; monitor INR and anticoagulation carefully
🏠 Social Isolation and Self-Neglect
- Older adults living alone may delay seeking help for abdominal pain until the disease is complicated
- Social prescribing referral; ensure patient has a reliable emergency contact; consider community assessment where appropriate
- Nutrition counselling for patients living alone who may have poor dietary fibre intake; social services referral if self-neglect is evident
💐 Cancer Fear and Diagnostic Certainty
- Diverticular disease is common and real, but it should never be used to explain away symptoms that require cancer exclusion
- Patients with diverticulosis who present with new symptoms have the same cancer risk as the general population plus their existing diverticular disease
- Never attribute persistent symptoms to diverticular disease without appropriate investigation; document CRC exclusion reasoning clearly
🍽️ Diet and Lifestyle Anxiety
Many patients with diverticular disease develop significant anxiety about food, avoiding all seeds, nuts, and high-fibre foods based on outdated guidance (this advice has no evidence base). This dietary restriction often causes nutritional deficiency without preventing attacks. Correcting this misconception and providing current evidence-based dietary guidance is an important part of management.
“I want to address something many patients are worried about: the advice about avoiding seeds and nuts. The evidence does not support this, and in fact, it was never based on good research. The opposite is true — a high-fibre diet, including seeds and nuts, is what we now recommend in remission.”🧠 Surgery Fear and Recurrence Anxiety
Fear of needing a stoma or major abdominal surgery is very common in patients with diverticular disease. This fear can cause patients to minimise symptoms, delay seeking help, or refuse appropriate management. Accurate, compassionate information about surgical rates and the availability of elective laparoscopic colectomy (which usually avoids stoma) reduces fear-driven non-engagement.
“I can hear you are worried about surgery. Let me give you some specific information: most people with diverticulitis — even those with recurrent attacks — are managed without surgery. If surgery does become the right option, it is usually planned, and techniques have improved significantly.”📈 Cancer Fear
Diverticular disease and CRC are both common in the same age group and frequently coexist. A diagnosis of diverticulosis does not protect against CRC. New symptoms in a patient with known diverticulosis require the same cancer vigilance as in any other patient. Patients are often falsely reassured by their diverticulosis diagnosis.
“Your known diverticulosis does not rule out other causes of your symptoms. If the pain or change in bowel habit does not settle as expected, I will be arranging further investigation to make sure we are not missing anything else.”🏢 Work, Activities, and Quality of Life
Recurrent diverticulitis significantly impairs quality of life through unpredictable attacks, time off work, dietary restrictions, and the social impact of altered bowel function. The chronicity of diverticular disease — and the real risk of recurrence — must be discussed as part of long-term management, including when to consider elective surgery.
“I want to ask how this is affecting your day-to-day life — your work, your diet, things you enjoy. Because if these attacks are significantly disrupting your life, that changes what we might consider as the best long-term plan for you.”- Not asking about PR bleeding — missing the risk of diverticular haemorrhage
- Not asking about urinary symptoms — missing colovesical fistula
- Attributing all new symptoms to diverticular disease without considering CRC
- Not exploring the antibiotic expectation before refusing or prescribing
- Not asking about duration (symptoms >6 weeks need the NG12 colorectal route — FIT first)
999 / Same-Day Hospital
Act immediately- Hinchey III–IV: peritonism / perforationGuarding + rebound + rigidity → 999; IV antibiotics en route; emergency laparotomy required
- Massive diverticular haemorrhage with haemodynamic compromiseTachycardia + hypotension + large PR bleeding → 999; IV access; group and save; fluid resuscitation
- Complicated diverticulitis (sepsis features, uncontrolled pain, vomiting/unable to take fluids, mass)Same-day hospital assessment for CT, IV antibiotics and surgical review; abscess likely
- Colovesical fistula (pneumaturia, faecaluria, urosepsis)Same-day urology + colorectal surgery; CT fistulogram; risk of ascending sepsis
- Immunocompromised patient with any diverticulitis featuresLower threshold for admission; peritonism may be absent or attenuated; CT urgently
Urgent Assessment
Days- Systemically unwell or significant comorbidity, but no complicated featuresCo-amoxiclav for 5 days (NG147); review at 48–72 hours; if worsening, same-day hospital assessment
- Symptoms >6 weeks / persistent change in bowel habit / weight lossNG12 colorectal route (FIT first; suspected cancer referral if FIT ≥10 µg Hb/g); do not attribute prolonged symptoms to diverticulosis alone
- Palpable abdominal mass in known diverticulosisSame-day hospital assessment (abscess/phlegmon; CT); NG12 colorectal route if malignancy not excluded — cannot exclude carcinoma without imaging
- Moderate PR bleeding, haemodynamically stableUrgent FBC + clotting; hospital assessment same day; colonoscopy within 24 hours to identify source
- Recurrent episodes affecting quality of life, or after complicated diseaseIndividualised colorectal surgical discussion of elective resection — not a fixed episode count
Primary Care Management
GP practice- Uncomplicated acute diverticulitis (systemically well, tolerating oral intake)Watchful waiting per NICE NG147; no routine antibiotics; liquid diet initially; adequate analgesia; safety-net; review in 48–72 hours when indicated
- Incidental diverticulosis counsellingDietary advice (30g/day fibre in remission); exercise; NSAID avoidance; correct dietary myths (no seed/nut restriction); cancer surveillance per CRC screening programme
- Chronic diverticular pain (chronic intermittent symptoms in remission)Analgesia (paracetamol); high-fibre diet; regular exercise; consider antispasmodics; avoid NSAIDs and opiates; review for CRC if new features
- Annual review of recurrent diverticular diseaseMedication review (NSAID avoidance); dietary adherence; exercise; surgical discussion if recurrent episodes affect quality of life; mental health screen; last colonoscopy date
- Prescribing antibiotics for uncomplicated diverticulitis without acknowledging the NICE NG147 guidance against routine use
- Discharging a patient with peritonism, sepsis features, uncontrolled pain or inability to take fluids to home management
- No safety-net, or no 48–72 hour review when indicated, for a patient managed at home
- Not considering the NG12 colorectal route (FIT first) for symptoms lasting >6 weeks
- Not specifically examining for peritonism (guarding, rebound) — the critical finding that changes triage to 999
- Missing a palpable LIF mass and not arranging urgent CT
- Not measuring vital signs in a patient with abdominal pain and fever
- Not doing a urine dipstick when urinary symptoms are reported
- Arranging colonoscopy during the acute diverticulitis attack (perforation risk)
- Not ordering CRP to guide the primary care management decision
- Failing to arrange post-recovery colorectal assessment where indicated (e.g. no CT confirmation, alarm features)
- Not considering CT in a patient with a palpable abdominal mass
“Diverticulosis means there are small pouches — called diverticula — that have formed in the wall of your large bowel over time. They are extremely common in people of your age and are usually completely harmless. Diverticulitis is what happens when one of these pouches becomes inflamed or infected — that is what is causing your pain and fever now. The good news is that the majority of attacks — including yours, from what I can tell — settle down with rest, fluids, and adequate pain relief. Most people do not need antibiotics, and most do not need surgery. However, I want to monitor you carefully over the next few days and arrange a camera test of the bowel once this settles, just to make sure everything looks as expected.”
“Should I avoid nuts and seeds?”
“This is a really common question, and it is based on advice that used to be given but that we now know is not supported by evidence. The current guidance is actually the opposite — a high-fibre diet, including seeds, nuts, and wholegrains, reduces the risk of further attacks when you are well. The only time we change this is during an acute attack, when a softer, lower-fibre diet is more comfortable for a few days.”
“Why are you not giving me antibiotics? I have an infection.”
“That is a really fair question. In the past, we always gave antibiotics for diverticulitis. But good-quality evidence from several large studies has shown that for attacks like yours — where you are not running a high temperature and can manage fluids at home — antibiotics do not actually shorten the illness or prevent complications. The NICE NG147 guideline on diverticular disease now recommends watching carefully and keeping you well-monitored rather than giving antibiotics routinely. I will give you very clear advice about when that changes.”
Asymptomatic Diverticulosis
Incidental finding on colonoscopy or imaging. Requires dietary advice (high fibre, NSAID avoidance), cancer surveillance per bowel cancer screening programme. No treatment required.
Uncomplicated Acute Diverticulitis
LIF pain + fever + raised CRP; no peritonism, no abscess on CT. Manage in primary care with watchful waiting per NICE NG147.
Complicated Acute Diverticulitis (Hinchey I–IV)
Abscess (I/II), purulent peritonitis (III), or faecal peritonitis (IV). Hospital management with CT, IV antibiotics, and surgical assessment.
Diverticular Haemorrhage
Sudden large-volume painless PR bleeding; most common cause of major lower GI bleeding in older patients; usually arterial (vasa recta at diverticular neck); colonoscopy or IR angiography.
Colorectal Cancer (CRC)
CRC and diverticulosis coexist in the same age group and can present identically. Change in bowel habit, PR bleeding, or LIF mass in a patient with known diverticulosis must trigger CRC exclusion. Suspected cancer pathway referral if red flags present. Post-recovery colorectal assessment where indicated.
Urinary Tract Infection (UTI)
LIF pain + dysuria + fever in women may be UTI rather than diverticulitis. Urine dipstick and M/C/S essential. However, pericolic inflammation from diverticulitis commonly causes sterile pyuria — this does not mean UTI.
Ovarian Pathology (women)
Ovarian cyst, torsion, or ectopic pregnancy cause LIF pain in women and can closely mimic diverticulitis. Pelvic ultrasound in any woman of reproductive age with LIF pain of uncertain cause.
Irritable Bowel Syndrome
IBS causes chronic intermittent LIF pain and change in bowel habit but without systemic features (no fever, normal CRP, normal FBC). Diverticulosis often coexists with IBS; both diagnoses may need to be managed simultaneously.
Hinchey I — Pericolic Abscess
Small abscess confined to the mesentery adjacent to the colon. IV antibiotics; CT-guided drainage if >3cm; usually resolves without surgery.
Hinchey II — Pelvic or Distant Abscess
Larger abscess distant from the perforation. CT-guided percutaneous drainage; IV antibiotics; surgical option if drainage fails.
Hinchey III — Purulent Peritonitis
Perforation with purulent pus in the peritoneal cavity. Emergency surgical management — the operative approach (e.g. Hartmann’s, resection with primary anastomosis, selected laparoscopic lavage) is determined by the colorectal team; IV antibiotics; HDU/ICU post-operatively.
Hinchey IV — Faecal Peritonitis
Free faecal contamination of the peritoneal cavity. Most severe; highest mortality (40–50%); emergency surgical management (approach by the colorectal team); aggressive resuscitation.
- Falsely reassuring the patient that diverticulosis explains all their symptoms without CRC consideration
- Reinforcing the outdated seeds and nuts restriction (not evidence-based)
- Not explaining that post-recovery colonoscopy is needed to exclude CRC
- Not addressing the antibiotic expectation with the NICE NG147 evidence
- Arranging colonoscopy during the acute attack rather than post-recovery
- Not planning post-recovery colorectal assessment where indicated
- Not using the NG12 colorectal route (FIT first) when red flags (weight loss, change in bowel habit >6 weeks) are present
- Repeatedly treating presumed UTI without considering colovesical fistula in a patient with recurrent infections and known diverticular disease
Validate — the antibiotic expectation is completely understandable
For decades, antibiotics were the standard treatment for diverticulitis, and most patients have either been given them before or expect them now. Acknowledging that this is a completely reasonable expectation — and that the guidance has changed relatively recently based on new evidence — is much more effective than simply refusing.
“I completely understand why you are expecting antibiotics — that was the standard treatment for many years. But I want to explain why the evidence has led us to change that approach for milder attacks like this one.”Explain — the NICE NG147 watchful waiting evidence
Large randomised controlled trials have shown that for uncomplicated diverticulitis in systemically well patients, antibiotics do not shorten recovery time, reduce complication rates, or prevent recurrence. The side effects (C. difficile, antibiotic resistance, allergic reactions) outweigh the minimal benefit in this population.
“Several large studies comparing antibiotics to no antibiotics in mild diverticulitis have found no difference in how quickly people recover, how many people needed surgery, or how many had complications. So for an attack like yours, the evidence does not support antibiotics — and they carry their own risks.”Negotiate — give a clear safety-net and plan
The watchful waiting approach only works clinically and relationally if the patient has clear, specific criteria for when to seek help and confidence that they will be reassessed promptly. The safety-net IS the treatment plan. Safety-net everyone; arrange a 48–72 hour review when clinically indicated — as here (managed without imaging, recent ibuprofen).
“What I can promise you is this: if things do not improve within 48–72 hours, or if they get worse in any of the specific ways I am going to describe, we will re-assess immediately — and at that point, antibiotics or hospital admission may be exactly the right thing. This is not me leaving you without support.”A temporarily low-fibre, soft-food diet reduces stool bulk and colonic workload, making the acute episode more comfortable. Clear fluids initially; introduce soft low-fibre foods as pain improves. This is a temporary measure — typically 3–7 days. Adequate fluid intake (at least 1.5–2L/day) is essential.
Gradually increase fibre over 2–3 weeks post-attack to reach 30g/day. Both soluble and insoluble fibre are beneficial. Ispaghula husk (Fybogel) can supplement dietary intake if 30g/day is difficult to achieve through food alone.
For decades, patients with diverticulosis were advised to avoid seeds, nuts, corn, and popcorn, based on the theoretical concern that these particles could lodge in diverticula and trigger inflammation. This advice was never based on clinical evidence.
Prospective cohort studies have found no association between nut, seed, or popcorn consumption and diverticulitis. In fact, nuts are an excellent source of fibre and have been associated with reduced diverticulitis risk. Continuing to advise restriction deprives patients of a nutritionally valuable, high-fibre food source.
NSAIDs inhibit prostaglandin synthesis, reducing the mucosal protective mechanisms of the colonic wall. Regular NSAID use is associated with a 3-fold increase in the risk of diverticular perforation and haemorrhage. This applies to all NSAIDs, including low-dose aspirin in higher doses.
Paracetamol 1g QDS is the analgesic of choice in diverticular disease. Opiates cause constipation and worsen diverticular disease; use the lowest effective dose with stool softeners if unavoidable. Document NSAID avoidance advice at every consultation.
Physical inactivity is an independent risk factor for diverticular disease. Prospective studies show that men with the highest physical activity levels have 37% lower risk of diverticulitis compared with the least active. Exercise improves colonic motility and reduces constipation, both of which reduce diverticular disease risk.
150 minutes/week moderate aerobic activity in remission. Rest during the acute attack. Walking is an excellent and accessible activity. Even modest increases in activity from a sedentary baseline significantly reduce risk.
Dietary fibre absorbs water and requires adequate hydration to soften stool and maintain colonic transit. Increasing fibre without adequate hydration causes constipation and worsens diverticular disease. The two must be increased together.
Aim for 1.5–2L of water per day (including other drinks), individualised in heart failure, advanced kidney disease or fluid restriction. During the acute attack, clear fluids are the priority. Avoid excessive caffeine and alcohol, both of which cause dehydration and worsen colonic function.
Obesity (BMI >30) is an independent risk factor for diverticular disease and for more severe complications. Abdominal adiposity impairs colonic motility and increases intra-abdominal pressure, predisposing to diverticular formation.
Weight management counselling; referral to Tier 3 weight management services if BMI >35; high-fibre diet for diverticular disease also supports weight management. Exercise has dual benefit.
- Paracetamol 1g QDS: First-line analgesia; safe and effective; does not worsen diverticular disease
- Adequate hydration: At least 1.5–2L/day; clear fluids initially if pain is severe; avoid dehydration which worsens the acute attack
- Low-fibre diet: Soft foods during acute attack for 3–7 days; then gradually increase to high-fibre 30g/day in remission
- Rest: Avoid strenuous activity during the acute attack; resume gradually as pain resolves
- 🔴 Avoid NSAIDs where possible (3× perforation risk); opioids only if unavoidable, lowest dose, shortest time
- Co-amoxiclav 625mg (500/125 mg) TDS × 5 days (oral, NICE NG147): If antibiotics are indicated and patient can tolerate oral intake; covers Gram-negative and anaerobic organisms; penicillin allergy alternative (NICE NG147): cefalexin (caution in penicillin allergy) or trimethoprim 200mg BD, each with metronidazole 400mg TDS; ciprofloxacin + metronidazole only when switching from IV ciprofloxacin with specialist advice (MHRA fluoroquinolone restrictions, January 2024)
- Trimethoprim 200mg BD or cefalexin + metronidazole 400mg TDS: For penicillin allergy (NICE NG147); ciprofloxacin + metronidazole only if switching from IV ciprofloxacin with specialist advice (MHRA, January 2024)
- Hospital IV antibiotics (co-amoxiclav 1.2g TDS IV or piperacillin-tazobactam): For complicated diverticulitis (Hinchey I–II); hospital-initiated
- 🔴 Indications for antibiotics (NG147): systemically unwell; immunosuppressed; significant comorbidity — complicated disease (Hinchey I–II) is treated in hospital
- High-fibre diet 30g/day: The most effective intervention for preventing recurrence; both soluble and insoluble fibre; increase gradually to avoid bloating
- Ispaghula husk (Fybogel) 1 sachet BD: Soluble fibre supplement if dietary 30g/day is difficult to achieve; dissolve in water; adequate fluid essential
- Mesalazine (5-ASA): Weak and inconsistent evidence for preventing recurrence after acute diverticulitis; NICE NG147 advises not to offer an aminosalicylate (or antibiotics) to prevent recurrent acute diverticulitis
- Probiotics: Insufficient evidence to recommend routinely; some studies suggest benefit in diverticular disease maintenance; individual patient discussion
“Paracetamol is the best painkiller for this condition — take it regularly every 4–6 hours, up to 4 doses a day, rather than waiting until the pain is severe. Avoid any anti-inflammatories like ibuprofen — they can make diverticular disease significantly worse and increase the risk of a serious complication.”
SCA pearl: The most commonly scored prescribing error in diverticulitis is either prescribing NSAIDs for pain (dangerous — 3× perforation risk) or failing to advise on NSAID avoidance. Stating explicitly that paracetamol is preferred AND that NSAIDs must be avoided is a key Tasks domain scoring item. Opiates causing constipation and worsening diverticular disease is a secondary but important point.
“I am prescribing antibiotics because your blood results and your symptoms suggest this is a more severe episode. Take them regularly with food. If you develop diarrhoea, particularly after finishing the course, come back — antibiotics can occasionally cause their own gut infection that needs treatment.”
SCA pearl: The key scoring point is that NICE NG147 does NOT recommend routine antibiotics for uncomplicated diverticulitis — stating this clearly and explaining the rationale to the patient scores in both Tasks (correct clinical decision) and Relating to Others (antibiotic expectation managed). Prescribing co-amoxiclav for an uncomplicated episode in a well patient without explaining this contradiction is a partial deduction. Always link prescribing to the specific NICE NG147 criteria (systemically unwell, immunosuppressed or significant comorbidity).
“This is a fibre supplement to help you reach the recommended 30g of fibre a day. Dissolve it fully in a full glass of water — not a small amount. Take it after meals. It may cause some bloating initially as your bowel gets used to the extra fibre; this usually settles within 2–3 weeks. Stop it during any acute attack.”
SCA pearl: Ispaghula husk scores in Tasks domain if mentioned in the context of long-term fibre supplementation and recurrence prevention. The key distinction is that it is for remission, not for acute attacks. Knowing the 30g/day target and that dietary fibre is preferable to supplements demonstrates clinical depth.
Cancer Vigilance Without Catastrophising
Diverticulosis is common and real, but it cannot be used to explain away symptoms that require cancer exclusion. The GP must maintain active cancer surveillance without causing unnecessary anxiety. The two-step approach — manage the acute episode AND arrange post-recovery colonoscopy — addresses both clinical and psychological needs.
“We are treating the current attack and we will also arrange a camera test once you are better — this is to make absolutely sure we have the full picture and are not missing anything. This is standard care, not because I am worried.”Food Anxiety and Dietary Myths
Many patients with diverticular disease have significant anxiety about food, restricting their diet unnecessarily based on outdated advice. Correcting the seeds and nuts myth and providing evidence-based dietary guidance significantly reduces food anxiety and improves nutrition and quality of life.
“I want to liberate you from the worry about seeds and nuts — the research is clear that they do not cause attacks. A varied, high-fibre diet including all these foods is what helps most.”Surgery Fear and Recurrence Anxiety
Fear of needing a stoma or emergency surgery is a dominant concern. Most patients with even recurrent diverticulitis do not require emergency surgery. Elective sigmoid colectomy, when indicated, is usually laparoscopic and avoids stoma. Accurate information significantly reduces surgery-related anxiety.
“I want to reassure you that the vast majority of people with diverticulitis — even those with repeated attacks — do not end up needing emergency surgery. If we ever get to the point of discussing planned surgery, that would be a carefully considered decision made together.”Practical Daily Life
Recurrent diverticulitis episodes cause missed work and social disruption. NSAID use (common for musculoskeletal pain in this age group) must be addressed. Exercise and weight management improve diverticular disease outcomes and overall wellbeing.
“Is there anything in your regular medications or your lifestyle that we should look at together? I am particularly thinking about any anti-inflammatories you might be taking for joint pain or other conditions.”48–72 hours — Planned review when clinically indicated (as here)
Clinical assessment: pain improving? Tolerating fluids and light diet? Any new symptoms (fever, vomiting, bleeding)? Repeat inflammatory markers only when clinically indicated. If deteriorating or not improving: same-day hospital assessment. Safety-net everyone; this review is local good practice rather than a universal NICE requirement, and is indicated here (no imaging, recent NSAID use, family history).
7–10 days — Recovery confirmation
Confirm resolution of acute episode; repeat inflammatory markers only if clinically indicated; dietary advice reinforced (begin transitioning to high-fibre diet); NSAID avoidance counselling; plan post-recovery colonoscopy referral; seeds/nuts myth corrected if not already done.
6–8 weeks — Post-recovery colonoscopy
Arrange colonoscopy (either via GP referral or gastroenterology) where indicated (here: not CT-confirmed, family history of CRC). Ensure high-fibre diet is established. Annual review appointment booked.
Annual review — diverticular disease monitoring
Episode frequency and severity; medication review (NSAID avoidance); dietary fibre adherence; exercise; weight management; mental health (anxiety about recurrence); colonoscopy / CRC surveillance up to date; surgical discussion if recurrent episodes affect quality of life; FBC if PR bleeding has been an issue.
Open access — urgent triggers for A&E
A&E if: peritonism (guarding/rebound/rigidity); fever >38.5°C with severe pain; large PR bleeding with haemodynamic symptoms (dizziness, pallor); vomiting and unable to maintain fluids; severe pain not controlled with paracetamol; any significant deterioration in the first 72 hours of community management.
⚠ Three scenario-specific phrases — use these verbatim
Why safety-netting matters beyond clinical care
- Not arranging a 48–72 hour review for all home-managed patients
- Not mentioning post-recovery colonoscopy
- Prescribing NSAIDs or not advising avoidance
- Not giving specific A&E criteria (fever threshold, peritonism, haemorrhage)
- No closing question for remaining concerns
- Hospital criteria communicated (clinical features, not a CRP cut-off)
- NICE NG147 watchful waiting explained; antibiotic expectation negotiated
- Paracetamol prescribed; NSAIDs stopped and avoided
- Safety-net plus 48–72 hour review (indicated here) arranged
- Post-recovery colonoscopy (6–8 weeks) planned
- Antibiotic expectation validated before explaining NICE NG147 evidence
- Surgery/cancer fear acknowledged and addressed with specific information
- Seeds and nuts myth corrected without being patronising
- Plan negotiated; patient’s concerns addressed throughout
- Specific A&E criteria communicated clearly, not vaguely
- Closing question asked
Who you are
Patricia, 58 years old, retired school administrator. Known diverticulosis diagnosed on colonoscopy 3 years ago. Has had one previous episode of diverticulitis 2 years ago, managed with a 5-day course of co-amoxiclav by her previous GP. Current episode: 3-day history of left iliac fossa pain (constant, 6/10 severity), low-grade temperature of 37.5°C at home, nausea but managing to sip fluids. No vomiting. No significant PR bleeding (a small amount of mucus on one occasion). No peritonism — tender but not rigid. Is able to mobilise. CRP 78 mg/L (blood result available). Has been taking ibuprofen for the pain “because that is what I always use for pain.”
Hidden agenda and ICE
Frightened this is something worse this time — specifically worried it could be bowel cancer because her mother had it. Embarrassed to mention the cancer fear without being directly asked. Firmly expects antibiotics because “that is what I got before and it worked.” Worried about surgery — a friend had an emergency colostomy for diverticulitis. Taking ibuprofen at home which is worsening the diverticular disease (must be asked about specifically). Has not been told about the seeds and nuts restriction being outdated and still avoids them.
Symptoms if asked directly
- LIF pain: constant, 6/10, worse on movement; started 3 days ago
- Temperature: 37.5°C at home; no rigors
- Nausea: present; managing small sips of fluid; no vomiting
- Bowel habit: slightly loose; small amount of mucus once; no significant bleeding
- Urinary symptoms: none
- Weight loss: none; appetite reduced for 3 days due to nausea
- Ibuprofen use: 400mg TDS for the past 3 days for the pain
- Duration of current episode: 3 days; similar to 2 years ago
- Last colonoscopy: 3 years ago (the diagnostic one); no follow-up scope arranged
Bonus details and resolution
- Ibuprofen use: only discloses if specifically asked about pain relief; may say “just ibuprofen, which is what I normally take” — this is a scored finding; must be stopped immediately
- Cancer fear: will not volunteer it; discloses if asked “is there anything specific you are worried this might be?” — “yes, my mother had bowel cancer and I keep thinking...”
- Seeds/nuts: volunteers “I still avoid seeds and nuts, is that right?” if dietary advice is discussed
- Challenge phrase: “But antibiotics worked last time — why can I not just have them again? I do not understand why you are doing things differently now.”
- Resolution: accepts watchful waiting if the clinician explains NICE NG147 evidence clearly AND provides specific A&E criteria AND confirms a 48–72 hour review. Remains resistant if only told “antibiotics are not needed” without evidence or review plan. Cancer fear must be specifically acknowledged and addressed — she will remain anxious if it is not named. Ibuprofen must be stopped and paracetamol prescribed instead.
Resolution: Accept watchful waiting if the clinician: (1) explains NICE NG147 clearly — “the evidence from large studies shows antibiotics do not help in mild cases like yours”; (2) arranges a specific 48–72 hour review; (3) gives specific A&E criteria (fever >38°C, severe pain, vomiting, unable to keep fluids down); (4) specifically stops the ibuprofen and prescribes paracetamol; (5) addresses the cancer fear directly. Award bonus marks if the seeds/nuts myth is corrected without being patronising and if post-recovery colonoscopy is planned and the reason explained as cancer exclusion (not as routine).
- Peritonism (guarding / rebound / rigidity) → 999
- Sepsis features, uncontrolled pain or a mass → same-day hospital
- Fever >38.5°C + severe pain → hospital
- Large PR bleeding + haemodynamic compromise → 999
- Unable to maintain oral fluids → hospital (IV fluids needed)
- Systemically unwell or comorbid (no complicated features) → co-amoxiclav + review
- Mild fever 37.5–38.4°C + well patient
- Symptoms >6 weeks or new change in bowel habit → NG12 colorectal route (FIT first)
- Palpable abdominal mass → same-day hospital assessment (CT)
- Recurrent episodes affecting quality of life → individualised colorectal surgical discussion
- Systemically well; localised LIF tenderness
- No peritonism; tolerating oral fluids
- Temp <38°C or mild fever only
- No significant PR bleeding
Step 2 — Triage: peritonism / sepsis / mass / uncontrolled pain / unable to take fluids → hospital
Step 3 — Community (if eligible): Watchful waiting per NICE NG147
• Paracetamol 1g QDS (NOT NSAIDs — 3× perforation risk)
• Low-fibre diet acutely; clear fluids; adequate hydration
• Review at 48–72 hours; specific A&E criteria communicated
Step 4 — Antibiotics (if indicated): systemically unwell / immunosuppressed / significant comorbidity
• Co-amoxiclav 625mg TDS ×5 days (penicillin allergy: cefalexin or trimethoprim + metronidazole, NG147)
Step 5 — Post-recovery: Colorectal assessment where indicated; high-fibre diet 30g/day
🔴 Opiates cause constipation — worsen diverticular disease
🔴 No routine antibiotics for uncomplicated diverticulitis (NICE NG147)
🔴 Colonoscopy contraindicated during acute attack (perforation risk)
🔴 Post-recovery colorectal assessment where indicated
🔴 Do NOT attribute persistent symptoms to diverticulosis — exclude CRC
🔴 Palpable mass → same-day hospital (CT); NG12 route if malignancy not excluded
✅ Seeds and nuts restriction is outdated — correct this myth
✅ 30g/day fibre in remission — strongest evidence for recurrence prevention
✅ Severity is clinical — CRP supports, with no isolated cut-off
| Hinchey Grade | Finding | Management |
|---|---|---|
| I — Pericolic abscess | Small abscess in mesentery; confined to colon | Hospital; IV antibiotics; CT; drainage if >3cm |
| II — Pelvic/distant abscess | Larger abscess away from perforation site | Hospital; CT-guided percutaneous drainage; IV antibiotics; surgery if drainage fails |
| III — Purulent peritonitis | Free purulent pus in peritoneal cavity | 999; emergency surgical management — approach by the colorectal team; HDU/ICU |
| IV — Faecal peritonitis | Free faecal contamination of peritoneal cavity | 999; emergency surgical management; aggressive resuscitation; mortality 40–50% |
| Uncomplicated (pre-Hinchey) | LIF pain + raised CRP; no abscess, no perforation | NICE NG147 watchful waiting; no routine antibiotics; paracetamol; 48–72 hour review |