Premenstrual Disorder (PMDD)
Red Flags — the cyclical illness that can still be dangerous
| Red flag | Why dangerous | Action |
|---|---|---|
| Active suicidal ideation / self-harm (often luteal-phase) | PMDD substantially increases suicide risk; intense luteal-phase despair can lead to acts even though it remits. | Risk assessment; urgent mental-health/crisis input if intent/plan; luteal safety plan |
| Underlying mood disorder with premenstrual exacerbation | Misdiagnosing a year-round depression/anxiety as PMDD leads to under-treatment of the primary illness. | Prospective diary; treat the primary disorder; mental-health input |
| Bipolar disorder | Antidepressants can destabilise mood; bipolarity is easily missed. | Screen for mania/hypomania; caution with SSRIs; specialist/mental-health input |
| Severe functional collapse / safeguarding concern | Severe PMDD can endanger the woman and affect care of children. | Urgent support; consider safeguarding; specialist referral |
| Postpartum / perimenopausal overlap | Other hormonal mood disorders can coexist or confuse the picture. | Clarify with history/diary; treat appropriately |
| Refractory severe symptoms | High morbidity; needs escalation beyond primary care. | Specialist premenstrual-disorder service / gynaecology |
🙎 "Am I a bad mother?"
Attribute the behaviour to a treatable condition; separate it from her character.
"The way you are with your family in those two weeks isn't who you are — it's a symptom of a hormone-driven condition. That you feel so awful about it tells me how much you love them. We can treat this."🧠 "Am I going mad / bipolar?"
Reassure and differentiate clearly from bipolar disorder.
"You're not going mad. Because it comes and goes with your cycle and you're completely well in between, this is premenstrual dysphoric disorder rather than bipolar — and that distinction matters, because it's very treatable."🆘 Taking the dark thoughts seriously
The remitting nature doesn't reduce the risk; assess and safety-plan.
"I'm really glad you told me about those thoughts — they're part of how severe this can get, and I take them seriously even though they lift after your period. Let's make a plan for the worst days and get you treatment so they ease."🚫 Undoing dismissal
Counter the "just PMS" message she may have internalised.
"This isn't something to just put up with or be embarrassed about. It's a recognised condition, and there are treatments that genuinely work — you deserve to feel like yourself all month."- Not assessing suicide/self-harm risk
- Not distinguishing PMDD from a year-round mood disorder (no diary)
- Dismissing it as "just PMS"; not screening bipolar
- Leaving her shame and fear unaddressed
Same day
Risk- Active suicidal intent / planUrgent mental-health/crisis assessment; safety plan
- Severe functional collapse / safeguardingUrgent support; safeguarding if children at risk
- Suspected bipolar disorderMental-health advice (not a same-day crisis unless risk); SSRI caution
Refer
Gynae / PMD service- Severe / refractory PMDDSpecialist premenstrual-disorder service; GnRH analogues
- Diagnostic uncertaintyAfter diary; specialist review
- Considering ovulation suppression escalationGynaecology
Primary care
Diagnose & treat- Suspected PMS/PMDD2-cycle diary; lifestyle/CBT; SSRI ± COCP
- Mood disorder w/ premenstrual exacerbationTreat primary disorder
- Established PMDD on treatmentReview, optimise, monitor risk
- Not escalating active suicidality
- Not recognising when specialist/GnRH escalation is needed
- No explicit risk formulation
- Not screening bipolar / excluding mimics
- Diagnosing PMDD on retrospective recall alone
- Ordering hormone profiles to "diagnose" PMDD
🚩 The symptom-free week is the whole game
The defining discrimination is whether there is a genuine symptom-free follicular phase. If yes (Leila), the diagnosis is a premenstrual disorder — PMDD given the severity, mood predominance, impairment and luteal suicidal thoughts. If symptoms persist throughout the month, it is a primary mood disorder with premenstrual exacerbation, treated as such. The prospective diary makes the call. For Leila: likely PMDD, with a mandatory ongoing risk plan and bipolar screened out.
- Labelling PMDD without the symptom-free-week criterion
- Missing an underlying mood/bipolar disorder
- Not escalating active risk to mental health
- Not knowing the specialist/GnRH route for refractory disease
Validate: name what she came for
Leila wants an explanation, to hear that she isn't "going mad", and something that works before her next bad fortnight. She may also expect a blood test for "hormone levels", or fear being told to "just put up with it". Say these expectations out loud before you explain anything. Otherwise asking for a diary can sound like being fobbed off.
"I suspect you came wanting two things: an answer to what's happening, and something that helps before your next bad couple of weeks. I think we can do both today, and I want you to leave with a plan, not just a leaflet."Explain: timing is the diagnosis, and there's no blood test
Hormone levels are normal in PMS and PMDD. The problem is the brain's sensitivity to the normal rise and fall of hormones, so a blood test cannot confirm it. What confirms it is the pattern: symptoms before the period, gone by the end of it, and a week that is genuinely clear. A daily diary kept over 2 cycles shows this and also rules out a depression that runs all month (RCOG GTG 48).
"Your hormone levels are almost certainly normal. What's different is how strongly your brain reacts to the normal monthly changes. That's why a blood test won't show it, but a daily diary will. It also gives us a baseline, so we can see whether treatment is really working."Negotiate: the diary comes first, but safety does not wait
The diary does not have to delay help. Keep her safe and start the things that cannot harm her today: direct questions about the suicidal thoughts, a written luteal-phase safety plan with crisis numbers, lifestyle changes, a CBT or self-help referral, and information. RCOG GTG 48 asks for a 2-cycle diary before a definitive diagnosis, unless urgent treatment is needed. Severe PMDD, marked impairment or significant risk justify starting an SSRI or hormonal treatment promptly while the diary continues; Leila's severity and luteal suicidal thoughts put her in that group. If you do, first screen for bipolar disorder, remember that a year-round depression has not yet been excluded, keep the diary going, review within 1 week (NICE NG222), and record the reason. Seek same-day mental-health advice instead if there is any intent or plan.
"I'd like you to start the diary tonight. Alongside it, we'll make a plan for your worst days, and I'll refer you for CBT, which really does help with this. Usually we'd wait for two months of diary before starting a medicine. Because the dark thoughts are so hard on those days, we can talk about starting one sooner. If we do, I'll see you again within a week."CBT does not change the hormonal trigger. It changes how the luteal thoughts ("I'm a terrible mother", "they'd be better off without me") are read and acted on. It builds coping plans for the predictable bad days and reduces the shame spiral that follows an outburst.
Give her the local NHS Talking Therapies self-referral route. Group, guided self-help and individual formats all exist. Tell the service about the premenstrual pattern and the luteal thoughts so they can adapt the work to it. It combines well with an SSRI or COC.
Seeing the pattern on paper turns an unpredictable "different person" into a predictable, time-limited phase. That helps her plan, eases self-blame, and helps her partner understand. It is also the outcome measure for every later step.
Paper DRSP or a cycle-tracking app that records symptom severity each day. Rate every day, including the good ones, because the good days prove the symptom-free week. Mark the days bleeding starts. Bring it to each review.
Aerobic exercise improves mood, sleep and stress reactivity. Its benefit on premenstrual symptoms builds over the whole cycle, not on the bad day itself.
Choose something that fits around two children: brisk walks on the school run, a home workout, or a regular class booked for the week before her period so it happens anyway. Aim for consistency, not intensity.
Luteal insomnia amplifies irritability and hopelessness. Alcohol lifts mood briefly, then worsens it and removes inhibitions. That matters because impulsive self-harm is more likely under the influence.
Keep regular sleep and wake times. Avoid caffeine after midday in the luteal week. Keep no alcohol at home on the diary's worst days, and put this in the safety plan. Smaller, regular meals can help if cravings and energy dips drive irritability.
Predictable symptoms can be planned around. Cutting avoidable stress in the known window lowers the chance of the conflict that leaves her ashamed.
Schedule difficult conversations, deadlines and big family events in the follicular phase where she can. Agree a "time-out" signal with her partner for flashpoints. Share the plan with a trusted person.
Agnus castus (chasteberry) has some trial support, but safety data are limited. Calcium and vitamin D have some supportive evidence. Vitamin B6 is listed by RCOG, but high doses cause neuropathy.
If she prefers a non-prescription option, suggest a product with the UK Traditional Herbal Registration (THR) mark. Keep B6 within NHS limits. Avoid St John's wort if an SSRI or COC is likely. Do not let a supplement delay effective treatment for PMDD with luteal suicidal thoughts.
- Luteal phase only (day 15 to menses): suits regular cycles, purely premenstrual symptoms, and women who want less drug exposure or fewer sexual side effects.
- Continuous: suits irregular cycles, co-existing anxiety or depression, symptoms starting early in the luteal phase, or poor response to luteal dosing.
- SSRIs act within days on premenstrual symptoms, unlike in depression, which is why the luteal regimen works. RCOG GTG 48 supports either regimen.
- Stopping: luteal dosing stops each cycle at menses. After continuous use, taper the dose rather than stopping abruptly.
- Dose per SPC and local formulary. Citalopram and escitalopram have maximum doses because of QT prolongation (MHRA Drug Safety Update, Dec 2011).
- RCOG GTG 48: drospirenone-containing COCs may be effective and should be considered first-line pharmaceutical options. Emerging data favour continuous rather than cyclical use, because the hormone-free interval can bring symptoms back.
- Continuous or tailored regimens are outside the product licence but are supported by the CoSRH guideline Combined Hormonal Contraception (2019, amended 2023; now published by CoSRH). Explain this and record it.
- Before prescribing: UKMEC 2025 check (migraine with aura, VTE history, smoking at 35 or over, BMI, BP), BP, BMI, and a drug interaction check.
- Discuss VTE honestly: the absolute risk is small, but it is higher than with levonorgestrel COCs (MHRA 2014).
- If she has had a progestogen-driven mood reaction in the past, review after 3 months. Some women do worse on any hormonal method.
"This works differently for premenstrual symptoms than for depression. It often helps within days, which is why some women take it only in the two weeks before their period. The first week can bring some nausea or jitteriness. If your thoughts get darker, not better, tell us the same day."
SCA: offering the luteal-only option, and knowing it works quickly in PMDD, shows you know this topic rather than generic depression care. Name that it is off-label.
"This pill works by stopping ovulation, which is what triggers the symptoms. Taking it back-to-back without the usual break tends to work better for this, although that is outside the licence. There's a small increase in clot risk, higher than some other pills, so here are the warning signs: a painful swollen leg, chest pain or sudden breathlessness."
SCA: a good answer names drospirenone, continuous use, the UKMEC check and the VTE trade-off in one breath.
"The patch keeps your oestrogen level steady, which usually damps down the monthly cycle, although it may not reliably stop ovulation. The coil protects the womb lining. The patch is not a contraceptive on its own, so we'll use the coil or another method as well."
SCA: the contraception point ("oestradiol patches are not contraceptive") is the detail examiners look for.
"This puts your ovaries to sleep for a while, like a reversible menopause. If it works, it confirms the cycle is the cause. We add back a low dose of HRT to protect your bones."
SCA: you don't prescribe it, but you should know it exists and that it needs add-back therapy. That reassures a patient that there are options beyond first line.
"You might read about progesterone for PMS. The good-quality trials show it doesn't help, and it can make things worse, so I won't suggest it."
SCA: knowing what not to prescribe, and saying why, earns marks for clinical knowledge.
The illness is cyclical, but the consequences add up. Relationships are strained by repeated luteal conflict, performance at work dips in a predictable pattern, and a woman's sense of herself as a good mother erodes. Naming these impacts, and planning for them, is part of treatment.
Family, Partner and Children
Luteal irritability lands on the people closest to her. Partners may start to see her as the problem, and children notice the pattern. After each episode comes guilt, which feeds the hopelessness in the next cycle.
With her consent, involving her partner turns the pattern into something they face together, with a shared plan for the difficult days. Children can be given simple, age-appropriate explanations. If there is any concern about the children's welfare or safety at home, follow local safeguarding procedures.
"Would it help if your partner came to the next appointment? When the people at home understand this is a treatable condition, they can help you through the difficult days instead of it turning into an argument."Safety at Home: Domestic Abuse
"Irritability" and "relationship conflict" can sometimes be the visible part of an abusive relationship. PMDD does not cause abuse, and abuse is never the victim's fault, even when she blames her own behaviour.
Ask safely, when she is alone: "Do you ever feel frightened of your partner?" If she says yes, follow local domestic abuse pathways and think about any children in the household.
"I ask everyone this: do you feel safe at home? Has anyone ever hurt you or made you feel afraid?"Work and Study
Concentration, energy and patience dip in a predictable window. Some women take repeated short absences that are recorded as unrelated minor illnesses.
A fit note is rarely needed. Reasonable adjustments help more: flexible deadlines, the option to work from home on the worst days, and moving demanding tasks to the follicular phase. Severe, long-term PMDD may meet the Equality Act definition of disability, so explain this to her rather than deciding it for her.
"Would it help to have a letter that explains this is a medical condition with a predictable pattern? Many employers can make small changes around those two weeks."Driving and the DVLA
DVLA guidance does not name PMS or PMDD. Check the current DVLA guidance on depression and anxiety: it says that someone with severe symptoms, including significant memory or concentration problems, agitation, behavioural disturbance or suicidal thoughts, must not drive and must tell the DVLA. People with milder symptoms without those features do not need to tell the DVLA.
Discuss this with Leila and record the discussion. Tell her not to drive whenever she has suicidal thoughts, agitation or poor concentration, and that if her symptoms meet the DVLA description she must tell the DVLA. If you are unsure whether she meets it, check the DVLA guidance or ask the DVLA medical advisers rather than deciding for her. Also warn that some SSRIs cause drowsiness at first.
"On any day when you're having thoughts about not being here, or feel agitated or can't concentrate, please don't drive. Get a lift or use other transport. The DVLA has rules for when mood symptoms mean you need to tell them, so let's look at those together."Identity and Shame
Many women describe two selves: the capable woman of the follicular weeks and the "monster" of the luteal ones. Years of being told it's "just PMS" can leave deep shame and a fear of being "mad".
A diagnosis with a name, a mechanism and treatment is itself a psychological intervention. Peer support from patient organisations (e.g. the National Association for Premenstrual Syndrome, or IAPMD) reduces isolation.
"The person you are in your good weeks is you. What happens in the bad weeks is the condition acting on your brain. Your guilt shows how much you care. It doesn't show that you're a bad mother."Fertility, Pregnancy and Future Plans
Treatment choices depend on family plans. A COC and ovulation suppression cannot be used while trying to conceive. SSRIs need a discussion before conception.
A history of PMDD is worth flagging for the perinatal period. Ask about mood at booking and after the birth, because women with hormone-sensitive mood symptoms may be more vulnerable then.
"Are you thinking about more children in the next year or two? That changes which treatment makes most sense, and it's something we'd plan around together."Today: Safety, Diary, First-Line Measures
Direct risk assessment, documented as a formulation of her needs and safety. Do not assign a risk score (NICE NG225). Write a luteal-phase safety plan and give crisis numbers. Start the DRSP. Give lifestyle advice and the NHS Talking Therapies self-referral route. Arrange TFTs or FBC only if a mimic is suspected. If severity or the suicidal thoughts justify starting an SSRI or COC before the diary is complete, record the reason (severity or risk; the diary continues), screen for bipolar disorder before an SSRI, and complete the UKMEC 2025 check and BP/BMI before a COC.
1 Week (if SSRI started) or 2–4 Weeks (phone): Early Check
If she started an SSRI: review within 1 week because of the luteal suicidal thoughts (NICE NG222, increased risk). Ask about side effects, agitation and worsening thoughts. Otherwise, a short phone call before her next luteal phase to check the safety plan is in place and that she is keeping the diary.
After 2 Cycles (~8 Weeks): Diary Review and Diagnosis
Go through the diary together. A luteal pattern with a symptom-free week confirms PMS or PMDD, so agree or continue first-line treatment. Symptoms all month mean a primary mood disorder, so manage as that (NICE NG222). Repeat the risk review.
After 2–3 Treated Cycles: Judge the Response
Repeat the diary. Good response: continue, and review contraception and BP yearly if she is on a COC. Partial response: change regimen (luteal to continuous SSRI, a different SSRI, a continuous COC) or combine SSRI with COC. No response: move to second line or refer.
Refractory or Uncertain: Refer; Then Ongoing Review
If simple measures (COC, SSRI, vitamin B6) have failed and severity justifies it, refer routinely to gynaecology or a specialist premenstrual disorder clinic, with the diaries and a treatment history. Refer to mental health if risk rises or the diagnoses overlap. Long term: review at least yearly, re-check UKMEC, ask about mood and plans, and reassess in the perimenopause.
Memory rule: monitoring in PMS / PMDD
At every contact: Ask about suicide directly, and ask how the worst days were, not today. Look at the diary: pattern and scores. Check the drug: SSRI side effects and agitation; COC with BP, BMI and UKMEC. Screen for bipolar again if mood lifts abnormally. Take the social temperature: home, children, work, alcohol.
| What | Test / check | When | Action threshold |
|---|---|---|---|
| Suicidal thoughts, self-harm | Direct questions; formulation of needs and safety (no risk scores, NICE NG225) | Every contact; 1 week after starting an SSRI if at increased risk | Intent, plan or recent self-harm → same-day crisis or liaison mental-health assessment; 999 if immediate danger. Thoughts becoming more frequent → review the plan and consider a mental-health referral. |
| Diagnosis and response | DRSP or equivalent prospective diary | Baseline 2 cycles; repeat after 2–3 treated cycles | No symptom-free week → primary mood disorder. Little change on treatment → change regimen, combine, or step up. |
| SSRI tolerability | Side effects, agitation, sexual function, bleeding | 1 week (if at risk); each review | New agitation or worse suicidal thoughts → same-day review. Intolerable side effects → change SSRI or regimen. |
| Bipolar switch | Elevated mood, reduced need for sleep, impulsivity | Each review after starting an SSRI | Hypomanic features → stop or review the SSRI; urgent psychiatric advice (NICE CG185). |
| COC safety | BP, BMI, UKMEC 2025 re-check, VTE symptoms | At the start; then at least yearly | New UKMEC 3/4 condition (e.g. migraine with aura, high BP) → stop or switch. |
| Drospirenone + potassium-raising drugs | Serum potassium | Consider in the first cycle (SPC) | Raised potassium → review the combination. |
| Vitamin B6 users | Dose; tingling or numbness | Each review | Neuropathic symptoms → stop the supplement. |
| Oestradiol + progestogen | Bleeding pattern, progestogen side effects | Each review | Unscheduled bleeding → assess. Symptoms returning on the progestogen → review the route or dose with gynaecology. |
| GnRH analogue (specialist) | Add-back adherence; DEXA | Annual DEXA on long-term treatment | Falling bone density → specialist review of whether to continue (RCOG GTG 48). |
| Function and relationships | Work days lost, family conflict, alcohol (AUDIT-C) | Each review | Worsening → revisit CBT, involve her partner, and ask again about domestic abuse. |
⚠ Three scenario-specific phrases: use these verbatim
Why safety-netting matters beyond clinical care
- No safety plan despite luteal suicidal thoughts
- Treating "depression" with no regard to the cyclical pattern; missing the luteal-SSRI option
- Not offering ovulation suppression / not knowing escalation
Who you are
Leila Hassan, 34, two children. For years, in the 10–14 days before each period you become intensely irritable, tearful, anxious and hopeless — you snap at your partner and kids and have had fleeting thoughts that they'd be better off without you. Within a day or two of your period starting it lifts and you feel completely normal — "like myself" — and you function well the rest of the month. You're frightened by the intensity and the dark thoughts, deeply ashamed of how you treat your family, and you wonder if you're "going mad" or bipolar. You have no symptoms in the week after your period. You're not on hormonal contraception and are otherwise well.
Hidden concerns (reveal if explored)
The dark thoughts (main): they frighten you; they're fleeting and you've never had a plan, but you've never told anyone. If asked gently, you'll disclose.
Shame: you feel like a bad mother. Being told it's a condition, not your character, is a huge relief.
Fear of being "mad"/bipolar: reassurance that this is cyclical and treatable helps enormously.
Contraception: you're open to the pill if it might help.
Clinical details if asked
- Symptoms 10–14 days premenstrually; resolve within 1–2 days of bleeding; genuinely well the week after
- Mood predominant: irritability/rage, tearfulness, anxiety, hopelessness; some bloating/breast tenderness
- Fleeting luteal thoughts "they'd be better off without me"; no plan, no intent, never acted; some protective factors (your children)
- No periods of feeling high/sped up/not needing sleep (no mania); no year-round low mood
- No past psychiatric diagnosis; not on contraception; no medical problems; not pregnant
- Significant impact on your relationship and your guilt about the children
Reactions at key moments
- On being told it's PMDD, not bipolar: visibly relieved — "so there's a name for it?"
- On the risk questions: hesitant but discloses if asked kindly; relieved to be taken seriously.
- On the diary: happy to keep one.
- On the SSRI working quickly / luteal option: surprised and encouraged.
- Challenge line: "Be honest — does this mean there's something seriously wrong with me? Am I bipolar?"
Resolution: Leila is helped if the GP: (1) recognises the cyclical luteal pattern with a symptom-free week as PMDD, distinguishing it from a year-round mood disorder/bipolar, and arranges a prospective 2-cycle diary to confirm; (2) conducts a sensitive, thorough risk assessment of the luteal suicidal thoughts and makes a safety plan; (3) validates her and relieves her guilt, attributing the behaviour to a treatable condition; (4) offers effective treatment — an SSRI (continuous or luteal-phase) and/or a combined pill, plus lifestyle/CBT — and knows the specialist/GnRH escalation route; (5) reviews early. She stays frightened and ashamed if dismissed as "just PMS", if the risk and diagnosis aren't taken seriously, or if no clear treatment plan is offered.
Pattern: luteal-phase symptoms resolving with menses + a symptom-free week. PMDD = severe mood-predominant form with impairment. Confirm with a prospective ≥2-cycle diary (DRSP). Differentiate from a mood disorder with premenstrual exacerbation (symptoms all month) and bipolar. Always assess suicide/self-harm risk (luteal phase).
1. Explanation, lifestyle + CBT for everyone (need not come before medication; start promptly if severe). 2. SSRI — continuous OR luteal-phase (works within days); and/or combined pill (continuous/drospirenone-containing) to suppress ovulation. 3. Escalate (specialist): GnRH analogues + add-back HRT; rarely surgery. Safety plan throughout; review early; specialist/gynae for severe/refractory.