Itch (Pruritus)
Red Flags — itch as a sign of serious disease
| Red flag | Why it matters | Action |
|---|---|---|
| 🟣 Generalised itch + night sweats / weight loss / fever / lymphadenopathy | Hodgkin/non-Hodgkin lymphoma (and other haematological malignancy) — itch can precede diagnosis. | Examine nodes/spleen; FBC, film, LDH, ESR; urgent suspected-cancer referral — NICE NG12 |
| Itch + jaundice / pale stools / dark urine | Cholestasis / biliary obstruction (incl. malignancy). | LFTs; imaging; refer per cause (urgent if obstructive jaundice) |
| Itch in pregnancy (palms/soles, often later pregnancy) | Intrahepatic cholestasis of pregnancy — risk to the fetus (RCOG Green-top 2022). | Contact the maternity/obstetric team promptly for bile acids + LFTs; ask about fetal movements — reduced movements → immediate maternity assessment |
| Aquagenic itch (within minutes of water contact, e.g. bath/shower) | Polycythaemia vera (raised haematocrit) — thrombosis risk. | FBC; haematology if polycythaemia |
| Crusted (Norwegian) scabies / immunosuppression | Highly contagious; underlying immunosuppression (incl. HIV). | Dermatology; treat aggressively; infection control; investigate immune status |
| Anaphylaxis / acute angioedema (itch + swelling/wheeze) | Airway/circulatory emergency. | Adrenaline; emergency management |
🔎 Reframing "dry skin"
Explain why this itch needs investigating.
"Dry skin is common and I'll treat the itch — but dry skin doesn't usually cause night sweats and weight loss. Those make me want to check what's going on underneath, to be safe."⚖️ Thorough, not alarming
Pitch the cancer-pathway work-up proportionately.
"Most of the time these tests are reassuring. Given your symptoms, the responsible thing is to examine you and do some blood tests quickly rather than just hand over a cream."😴 The misery of itch
Acknowledge the impact and treat it now.
"Itch like this is exhausting and ruins your sleep — that matters, and I'll give you something to ease it tonight while we sort out the cause."🤝 Holding uncertainty
Be honest while supportive.
"I can't tell you the cause yet, but I'd rather check properly than miss something. Whatever it is, we'll work through it together."- Giving an emollient/antihistamine without the rash-vs-no-rash reasoning
- Missing the B-symptoms/lymphoma red flags and NG12 referral
- Not screening systemic causes (no bloods) or scabies/drugs
- Accepting "dry skin" at face value
Days (cancer pathway)
NG12- Itch + B-symptoms / lymphadenopathyFBC/film/LDH; urgent haematology (lymphoma) — Frank
- Obstructive jaundiceUrgent LFTs/imaging/referral
- Aquagenic itch + raised haematocritRepeat FBC; haematology if persistent erythrocytosis
Systemic screen
No rash- Generalised itch, no rashFBC, ferritin, U&E, LFTs, calcium, TFTs, glucose ± LDH
- Pregnancy itchPrompt maternity contact — bile acids + LFTs (immediately if ↓ fetal movements)
- Treat cause if foundRenal/liver/thyroid/iron/diabetes
Dermatological
With a rash- ScabiesPermethrin to patient + all contacts; wash linens
- Eczema/urticaria/lichen planusTreat the skin condition
- Senile xerosisEmollients; avoid soap/heat
- Treating a red-flag itch as routine dry skin
- Missing scabies in a household with affected contacts
- Not examining lymph nodes/spleen in itch-without-rash
- Not looking for jaundice or scabies burrows
- No systemic screen for itch-without-rash
- Omitting FBC/film/LDH when lymphoma is suspected
🚩 Itch without a rash is a systemic question
Frank's formulation is generalised pruritus without a primary rash, with B-symptoms (drenching night sweats, weight loss, fatigue) and lymphadenopathy — a red-flag presentation for lymphoma. The plan: examine nodes/spleen, FBC + blood film + LDH + ESR, urgent NICE NG12 haematology referral, and symptomatic relief (emollients, cooling agents, ± a short-term night-time sedating antihistamine if sleep stays disturbed) in the meantime — treating the misery now while urgently pursuing the cause.
- Diagnosing "dry skin" despite the red flags
- Not naming the systemic/malignant possibility and acting
- Not referring lymphoma red flags on NG12
- Not referring obstructive jaundice/pregnancy cholestasis urgently
Validate — name the expectation and the misery
Frank came for a cream. Three months of sleep-destroying itch is genuinely miserable, and his request is reasonable. If you start with "I'm worried about cancer", he hears that his problem has been hijacked. If you start by naming his request and the toll the itch is taking, he hears that you are on his side — which makes the next step easier to accept.
"You came in hoping for something strong to stop the itch — and after three months of being kept awake, I completely understand why. I am going to give you something for it today."Explain — share the reasoning behind the tests
The clinical reasoning is simple and can be shared openly: dry skin does not cause drenching night sweats, 6kg of weight loss or enlarged glands. Itch without a rash is sometimes the skin's way of signalling something happening inside the body. Most causes are treatable (iron, thyroid, liver, kidney), but the glands mean the blood specialists need to see him quickly.
"Here's what's making me think carefully: dry skin doesn't usually cause soaking night sweats, weight loss and swollen glands. Together those mean I want to do blood tests today and ask the specialists to see you quickly, to find out what's driving the itch."Negotiate — a concrete plan for tonight and for the cause
He leaves with two things: a symptom plan (emollient as a soap substitute and moisturiser, a cooling menthol cream, lukewarm short showers, nails short, and — only if sleep remains very disturbed — a short course of a sedating antihistamine at night with a driving warning) and a cause plan (bloods today, a suspected cancer pathway referral, a named date to discuss results, and a safety-net).
"So — for tonight, a moisturiser to use instead of soap and a cooling cream for the itchiest areas. For the bigger question, blood tests today and a fast-track referral. I'll ring you with the results myself. Does that sound like a plan you can go with?"Xerosis lowers the itch threshold: a disrupted stratum corneum lets irritants in and water out, and exposed nerve endings fire more readily. Emollients restore the lipid barrier and reduce transepidermal water loss. Soap and foaming washes strip lipids, so washing with an emollient instead removes a daily trigger.
Choose one the patient will actually use (a lighter cream by day, a greasier one at night). Smooth on in the direction of hair growth; apply after a bath while skin is damp. Use a pump or spatula rather than fingers in the tub. Fire safety (MHRA): all emollients — paraffin-containing or paraffin-free — soak into clothing and bedding and make them burn readily; warn smokers and anyone near open flames, and advise frequent washing of fabrics.
Heat and vasodilatation intensify itch; hot water also removes skin lipids. Itch is typically worse at night when skin temperature rises under bedding. A clear pattern of itch within minutes of water contact (aquagenic itch) is a clue to polycythaemia vera and should prompt an FBC rather than just advice.
Keep showers short and lukewarm; pat dry rather than rub; moisturise immediately. Keep the bedroom cool, use light cotton bedding, and avoid overheating (electric blankets, heavy duvets). A cool damp flannel or cooling gel pack on an itchy patch can abort a scratching episode.
Scratching gives brief relief by pain-mediated inhibition of itch signalling, but it damages the epidermis, releases inflammatory mediators and sensitises nerves — so itch returns stronger. Over time this produces lichenification (lichen simplex) and nodular prurigo, which itch in their own right.
Keep nails short; wear cotton gloves at night if scratching during sleep. Substitute: press, pinch or apply a cold pack instead of scratching. Habit-reversal techniques (noticing the urge, a competing hand action) help chronic scratchers. Treat any infected excoriations promptly.
Wool and rough synthetic fibres mechanically trigger itch; fragranced products, biological detergents and fabric conditioners act as irritants on a damaged barrier. Occlusive or tight clothing traps heat and sweat.
Loose cotton or silk-type clothing next to the skin; non-biological, fragrance-free detergent with an extra rinse; avoid bubble baths, perfumed wipes and "medicated" antiseptic washes. Review any topical products the patient has been self-applying — some (e.g. topical antihistamines, local anaesthetics) can themselves sensitise.
Itch peaks at night (circadian changes in skin temperature, cortisol and barrier function), and sleep loss lowers the itch threshold and worsens mood — a second vicious cycle alongside scratching. Improving sleep often reduces reported itch intensity.
Emollient and cooling measures just before bed; cool, dark room; cotton gloves; no screens in bed. A short course of a sedating antihistamine at night can be considered if sleep stays badly disturbed despite these measures — it helps by sedation rather than by switching off itch, and is best avoided in older or frail people.
Chronic itch and depression/anxiety are linked in both directions: stress amplifies itch perception and scratching, and relentless itch causes low mood, irritability and, in some, suicidal thoughts. Waiting for suspected-cancer results adds acute anxiety on top.
Ask about mood (PHQ-9/GAD-7 where useful); offer NHS Talking Therapies self-referral for persistent distress; name the waiting period as hard. If there is a fixed belief of infestation without evidence (delusional infestation), take the distress seriously, avoid arguing about the belief, and involve dermatology/psychiatry (psychodermatology services where available).
Emollient as moisturiser AND soap substitute ± topical cooling agent
- Emollient liberally and frequently; bath/shower emollient or cream wash instead of soap
- Menthol-containing cream or emollient (per local formulary / SPC) gives a cooling counter-sensation, useful at night
- Crotamiton is not a preferred routine treatment — it may irritate eczematous skin
- Topical steroid only where there is an inflammatory dermatosis (eczema, lichen simplex) — not for itch without a rash
Non-sedating by day if histamine-driven; sedating at night only short-term if sleep is disturbed
- Non-sedating (cetirizine, loratadine, fexofenadine): helpful in urticaria and other histamine-mediated itch; little effect on most systemic (cholestatic, uraemic, lymphoma) itch
- Sedating (chlorphenamine, hydroxyzine, promethazine): benefit is mainly sedation — consider a short trial at night if sleep remains poor despite Step 1
- Warn: drowsiness can carry over into the next morning — do not drive if affected
Match the drug to the mechanism — usually with specialist input
- Cholestatic: colestyramine first-line (BSG/UK-PBC 2018); rifampicin, naltrexone, sertraline are hepatology-led
- CKD-associated: optimise dialysis/renal care; gabapentinoids at renal dose are renal-team decisions; difelikefalin (TA890) in-centre haemodialysis only
- Lymphoma: itch usually settles with treatment of the lymphoma
- Chronic itch of unknown origin: phototherapy, SSRIs/mirtazapine or gabapentinoids — dermatology-led
"Use this instead of soap, and put it on at least two or three times a day — more is fine. It works best straight after a lukewarm shower. It can soak into clothes and bedding and make them catch fire easily, so don't smoke or go near open flames while using it, and wash your bedding often."
Prescribing an emollient with specific usage and fire-safety advice scores; handing over "some cream" without instructions does not. In Frank's case it relieves symptoms — it must not replace the work-up.
"This tablet mainly helps you sleep through the itch rather than switching the itch off. It can leave you drowsy into the next morning — if you feel at all slowed down, don't drive; it's against the law to drive when your driving is impaired by a medicine. Avoid alcohol with it. We'll review it in a few weeks."
Examiners reward the candidate who prescribes a sedating antihistamine with a driving warning, a time limit and awareness of falls/anticholinergic risk — and penalise one who presents it as a cure for systemic itch.
"This works well for hives and allergy-type itch. If your itch is coming from something inside the body, it may not help much — if so, tell me and we'll stop it rather than keep adding tablets."
Knowing that most systemic itch is not histamine-mediated — and saying so — distinguishes a reasoned plan from a reflex antihistamine prescription.
"Everyone at home needs to use this on the same day, even if they're not itching. Cover your whole body from the neck down, including between the fingers and under the nails, leave it on for 8 to 12 hours, then wash it off — and do it all again in a week. Reapply to your hands if you wash them. Wash bedding, towels and clothes at 60°C on the first day. The itch can carry on for a few weeks — that doesn't mean it's failed."
Scabies marks are lost for three reasons: contacts not treated, the second application not explained, and no warning about persistent itch (which drives unnecessary re-treatment).
"This powder soaks up the bile substances that cause the itch. Mix it well in juice. It also soaks up other tablets, so take your other medicines at least an hour before it or four to six hours after."
Rifampicin, naltrexone and sertraline for cholestatic itch are specialist-guided later lines (rifampicin needs LFT monitoring for hepatotoxicity) — know the order, don't start them in primary care without advice.
"There is a newer injection for kidney-related itch that the dialysis unit can give after your sessions. It's for people on hospital haemodialysis, so let's ask your kidney team whether it's right for you."
Accurately saying "that's a renal-unit treatment for people on in-centre haemodialysis" shows current knowledge without overreaching.
Work & Concentration
Months of broken sleep cause daytime exhaustion, poor concentration and irritability. Visible scratching in meetings or with customers is embarrassing. Upcoming hospital appointments and possible biopsies will need time off.
A fit note is rarely needed for itch alone, but reasonable adjustments (flexible start times, time for appointments) may help — and if lymphoma is confirmed, cancer counts as a disability under the Equality Act 2010 from diagnosis.
"How is the lack of sleep affecting you at work? If you need time for the hospital appointments, I can help with a letter."Driving & Sedating Medicines
Itch itself does not need to be reported to the DVLA. The driving risk is the treatment: sedating antihistamines impair reaction times, often into the next morning, and it is an offence to drive when impaired by any medicine. Severe sleep deprivation is itself a driving hazard.
If a serious diagnosis follows, driving advice is given for that condition and its treatment at the time — not assumed now.
"If you take the night-time tablet and feel at all drowsy or slowed down the next morning, please don't drive — it's not safe and it's against the law. The same goes if you're exhausted from lack of sleep."Family & What to Tell Them
Night-time scratching and soaked sheets disturb a partner's sleep too. Once a fast-track referral is mentioned, patients often struggle with whether and what to tell family. For scabies the family issue is practical — everyone must be treated together — and emotional, because of misplaced stigma.
"Would it help to bring someone with you to the results appointment? Some people find it easier not to carry the waiting on their own."Identity, Stigma & Shame
Scratch marks, "dirty" connotations of scabies, and the assumption that itch is "all in the mind" all cause shame. Scabies is caught through close skin contact, not poor hygiene — saying this explicitly lifts stigma. Excoriations and lichenified skin can also change how patients see themselves.
"Scabies has nothing to do with how clean you are — it spreads through close skin contact, and anyone can catch it."Fear & the Waiting Period
The time between referral and diagnosis is often the most anxious part of a cancer journey. Uncertainty, catastrophising and searching online at night (when the itch keeps them awake anyway) can all make it worse. A named results date and a named person to contact are therapeutic.
"The waiting is often the hardest bit. I'll call you myself with the blood results, and here's how to reach us if you're worried before the hospital appointment."Mood, Sleep & Delusional Infestation
Chronic itch is linked with depression and anxiety, and severe cases with suicidal thoughts — ask directly if mood is low. A small group of patients hold a fixed belief of infestation despite no evidence, often bringing "samples"; they need empathy, not confrontation, and psychodermatology input.
"Itch that goes on for months can really wear people down. How has your mood been? Have you had any thoughts that life isn't worth living?"Today — Bloods, Referral, Relief
Examination documented (nodes, spleen, liver, jaundice, skin). Bloods sent: FBC and film, U&E, LFT, calcium, TFT, ferritin, HbA1c/glucose, LDH, ESR/CRP; HIV test offered. Suspected cancer pathway referral (NICE NG12) sent the same day with the examination findings. Emollient and skin-care plan; night-time plan agreed. Safety-net given verbally and in writing. Results follow-up booked.
2–3 Days — Results Review (Named Clinician)
Clinician who requested the tests reviews and contacts the patient. Blasts or unexplained cytopenias on FBC/film → discuss with haematology the same day. Raised haematocrit → repeat FBC and consider secondary causes; same-day advice only with hyperviscosity symptoms, thrombosis or marked erythrocytosis (Hct ≥0.60 men/≥0.56 women). Deranged LFTs → liver screen and ultrasound. Anaemia/low ferritin → investigate cause. Check the referral has been received and an appointment is booked.
Within 28 Days — Faster Diagnosis Standard Window
Secondary care aims to confirm or rule out cancer within 28 days of referral. If the patient has not heard or appointments slip, the practice chases. Review symptom control by phone: sleep, sedation, falls, mood. If the patient deteriorates (fever, rapidly enlarging nodes, breathlessness, new jaundice), expedite.
4–6 Weeks — Symptom & Treatment Review
Is the itch better? Stop any sedating antihistamine that has not helped. If lymphoma is diagnosed: support, fit note/benefits advice, and shared care of symptoms with haematology. If cancer is ruled out and the screen is normal: reassess — repeat examination, consider drug causes, scabies, second-line tests (CXR, hepatitis serology, protein electrophoresis if indicated), and dermatology referral if itch persists.
3 Months+ — Chronic Pruritus Pathway
Persistent itch with a negative work-up still deserves review: some systemic causes (including lymphoma) declare themselves later, so re-ask about B-symptoms and re-examine nodes. Dermatology for chronic pruritus of unknown origin (phototherapy, systemic agents). Monitor mood and sleep.
Memory rule — itch monitoring
At every review: re-ask B-symptoms (sweats, weight, fever) and re-examine nodes/spleen if the cause is still unknown; score the itch and sleep (0–10 numerical rating scale is simple and repeatable); check sedation, falls and driving on antihistamines; screen mood; and make sure every referral has been received and every result actioned.
| What | How | When | Action threshold |
|---|---|---|---|
| Itch severity | 0–10 numerical rating scale; nights woken per week | Baseline; each review | No improvement at 4–6 weeks with a normal screen → reassess cause, second-line tests, dermatology |
| B-symptoms & nodes | History; examination of nodes, liver, spleen | Every review until cause found | New or enlarging nodes, splenomegaly, fever, sweats, weight loss → suspected cancer pathway (NG12) |
| FBC / film | Blood test | Baseline; repeat if symptoms change | Blasts or unexplained cytopenias → same-day haematology advice; persistent lymphocytosis → film/flow cytometry via urgent pathway; raised haematocrit → repeat FBC, same-day only if hyperviscosity/thrombosis |
| LFTs / bile acids | Blood test | Baseline; in pregnancy as advised by maternity | Cholestatic LFTs with jaundice → urgent pathway; pregnancy itch → prompt maternity contact (immediately if ↓ fetal movements) |
| Renal function | U&E, eGFR | Baseline; before gabapentinoids or renally cleared drugs | Dose-adjust per SPC; involve renal team for CKD-associated pruritus |
| Sedating antihistamine | Ask about drowsiness, falls, confusion, urinary symptoms | 2–4 weeks after starting | Any falls, confusion or next-day sedation → stop; no benefit → stop |
| Colestyramine | Bowel habit; timing of other drugs; INR if on warfarin | 4 weeks; periodically | Poor tolerance → hepatology advice on next line |
| Mood | PHQ-9 / GAD-7; direct question about suicidal thoughts | Baseline if distressed; each review | Suicidal ideation → same-day risk assessment; persistent low mood → treat in its own right |
| Scabies | Burrows, new lesions, contacts | If itch not easing 4 weeks after 2nd treatment | Residual itch with no new lesions → symptomatic care; new burrows → re-treat all contacts after checking technique |
⚠ Three scenario-specific phrases — use these verbatim
Why safety-netting matters beyond clinical care
- Symptomatic relief only, ignoring the cause/red flags
- Scabies treated without treating contacts/linens
- No safety-net / results follow-up
Who you are
Frank Adeyemi, 61. Three months of relentless, all-over itching with no rash — only scratch marks — that keeps you awake. You assume it's dry skin and want a strong cream or antihistamine. If asked, you've had drenching night sweats (soaking the sheets), lost about 6kg without trying, and feel more tired than usual. No yellowing you've noticed, normal bowels, no regular medications, and no one else at home is itching. You're keen to leave with something for the itch and hadn't thought the other symptoms were connected.
Hidden concerns (reveal if explored)
Wants relief (main): the itch is miserable and you're sleep-deprived.
Downplayed B-symptoms: you'll mention the night sweats/weight loss/tiredness only when asked — you didn't connect them.
Fear (if doctor seems concerned): you become worried if it's something serious; you respond to calm, clear explanation.
Clinical details if asked
- Generalised itch ~3 months, no primary rash (only excoriations); worse at night (sleep loss)
- Drenching night sweats; ~6kg unintentional weight loss; increased fatigue
- No jaundice/pale stools/dark urine noticed; normal bowels/urine; no aquagenic pattern specifically
- No medications; no affected contacts; no burrows; no recent travel
- On examination: no primary rash; firm, non-tender lymph nodes in the neck and armpits (you'll let the doctor "find" these)
Reactions at key moments
- If the doctor just prescribes a cream/antihistamine: you're satisfied — so a strong candidate must NOT stop there and should investigate.
- On "this needs blood tests and a referral": a bit anxious, reassured by calm clarity; relieved to also get something for the itch.
- On the glands being found: surprised; takes it seriously.
- Challenge line: "It's just dry skin though, isn't it? Can't you just give me a cream?"
Resolution: Frank is well served if the GP: (1) uses the rash vs no-rash fork and recognises generalised itch without a rash as a systemic question; (2) screens B-symptoms and examines lymph nodes/spleen, recognising night sweats + weight loss + lymphadenopathy as a lymphoma red flag; (3) arranges the systemic blood screen (FBC/film, LDH, ESR, ferritin, U&E, LFTs, TFTs, glucose) and an urgent NICE NG12 haematology referral; (4) also provides symptomatic relief (emollients, cooling agents, skin-care advice, ± a short-term night-time antihistamine with a driving warning) and safety-nets; (5) explains it calmly without false reassurance. He is poorly served if simply given a cream/antihistamine and sent away as "dry skin".
Dermatological: eczema, scabies (burrows/night/contacts → permethrin to all), urticaria, lichen planus, dermatitis herpetiformis, xerosis. Treat the skin condition.
Systemic: screen FBC/film, LDH/ESR, ferritin, U&E, LFTs, calcium, TFTs, glucose. Causes: liver/cholestasis, CKD, thyroid, iron deficiency, polycythaemia (aquagenic), diabetes, lymphoma.
🟣 Itch + night sweats/weight loss/fever/lymphadenopathy → examine nodes/spleen, FBC/film/LDH, urgent NG12 (lymphoma). Jaundice/pale stools/dark urine → cholestasis. Pregnancy (palms/soles) → bile acids + obstetrics. Relief: treat the cause + emollients, avoid soap/heat, cooling agents, sedating antihistamine at night only short-term (avoid in the elderly), break the scratch cycle, address sleep/mood.