Last updated: October 2026
PMDD (premenstrual dysphoric disorder) is a severe form of PMS. In the one to two weeks before a period it brings intense mood symptoms, such as depression, anxiety, anger or feeling out of control, which ease within a few days of bleeding starting. It is real and treatable: track your symptoms for two cycles and see a GP.
Below: the symptoms, how PMDD differs from PMS, how common it is, how it’s diagnosed in the UK, the treatments a GP can offer, what helps day to day, and whether PMDD counts as a disability.
If you’re struggling right now: PMDD can bring suicidal thoughts. They can feel overwhelming, even if you know they usually lift once your period starts. You don’t have to wait it out or cope alone.
- Call 999 or go to A&E if you might act on these thoughts or can’t keep yourself safe. Don’t drive yourself.
- Call NHS 111 and choose the mental health option for urgent advice, or use 111 online.
- Call Samaritans free on 116 123, day or night, 365 days a year.
What is PMDD?
Premenstrual dysphoric disorder is a cyclical, hormone-related mood disorder. The NHS describes it as a more severe form of premenstrual syndrome, with symptoms similar to PMS but much more intense. It is recognised as a distinct diagnosis in the DSM-5, the psychiatric diagnostic manual.
It isn’t a hormone imbalance. Hormone levels are usually normal; the difference seems to be how the brain reacts to the normal rise and fall of oestrogen and progesterone. The NHS says the cause isn’t clear but has been linked to being very sensitive to hormone changes.
PMDD is not a character flaw, and it isn’t “just PMS”. Ordinary PMS symptoms are a nuisance; PMDD can take over part of every month.
PMDD symptoms
The International Association for Premenstrual Disorders (IAPMD) lists the symptoms used for diagnosis. A diagnosis needs at least five, including at least one mood symptom.
Emotional symptoms
- Mood swings, sudden sadness or tearfulness (see crying for no reason)
- Feeling very sensitive to rejection or criticism
- Irritability or anger that leads to conflict with people close to you (see why am I so irritable?)
- Low mood, hopelessness, or feelings of worthlessness or guilt
- Anxiety, tension or feeling on edge
- Feeling out of control or overwhelmed
- Losing interest in work, hobbies or people
- Trouble concentrating, or brain fog
Physical symptoms
- Tiredness and low energy
- Sleeping much more or much less than usual
- Food cravings or overeating
- Bloating or weight gain
- Breast tenderness or swelling
- Headaches, cramps, and joint or muscle pain
The key feature is timing. Symptoms appear in the luteal phase, the 1 to 2 weeks between ovulation and your period, and clear up soon after bleeding starts.
How long do PMDD symptoms last?
Usually from a few days up to two weeks each cycle. They start after ovulation and ease within a few days of your period starting.
If low mood, anxiety or anger last all month, it may not be PMDD. Doctors call it premenstrual exacerbation (or worsening) when a condition such as depression is there all the time but gets worse before a period. That needs different treatment, so mention it to your GP. Our guides to low mood vs depression and anxiety symptoms may help you describe what’s going on.
PMDD vs PMS: what’s the difference?
| PMS | PMDD | |
|---|---|---|
| How common | Nearly everyone with periods has some symptoms; severe PMS affects about 2 to 4 in 100 | About 3 in 100 with a confirmed diagnosis |
| Main symptoms | Mostly physical: bloating, sore breasts, tiredness, mild mood changes | Mostly emotional: depression, anxiety, rage, feeling out of control |
| Severity | Uncomfortable but manageable | Disrupts work, relationships and daily life |
| Timing | Up to 2 weeks before a period | Up to 2 weeks before a period, with a clear symptom-free stretch after it starts |
| Suicidal thoughts | Not typical | Can happen; get help straight away |
| Diagnosis | Usually from your description | Daily symptom tracking for at least 2 cycles |
| Treatment | Lifestyle changes and painkillers often enough | Often needs CBT, medicine or both, sometimes specialist care |
For the milder end, see PMS symptoms: the full list. If you’re in your 40s and your symptoms have changed, also read perimenopause symptoms, as the two can overlap.
How common is PMDD?
Less common than many online figures suggest, but not rare. A 2024 review of 44 studies and more than 50,000 people, led by UK researchers, found:
- 3.2% met the criteria with a confirmed diagnosis (symptoms tracked over two cycles)
- 7.7% met the criteria with a provisional diagnosis (based on memory)
- 1.6% in community samples using confirmed diagnosis
The gap is why doctors ask you to track symptoms rather than rely on memory. IAPMD uses a rounder figure of around 1 in 20 people who menstruate.
PMDD is also linked to a higher risk of suicidal thoughts. A 2021 analysis of six studies found people with PMDD had roughly twice the odds of suicidal thoughts and of a past suicide attempt, which is why the safety box sits at the top of this page.
How PMDD is diagnosed in the UK
There’s no blood test or scan for PMDD. Diagnosis is based on the pattern of your symptoms over time.
- Track your symptoms daily for at least two cycles. The NHS and the Royal College of Obstetricians and Gynaecologists (RCOG) both recommend a symptom diary for at least two menstrual cycles in a row. Note period days, mood, physical symptoms and how much they affected you.
- Look for the pattern: a rise after ovulation, a drop once your period starts, and a symptom-free stretch in between.
- Book a GP appointment and take the diary. It turns “I feel awful sometimes” into evidence. Say plainly if you have had thoughts of suicide or self-harm.
- Specialist referral if needed. The NHS says you may be referred to a gynaecologist, psychiatrist or counsellor if first treatments don’t help. RCOG notes that, if a diary isn’t clear enough, a specialist may sometimes use hormone treatment for 3 months to help confirm the diagnosis.
A paper chart or a period app with a notes field works. IAPMD has more information on its website.
PMDD treatment: what a GP may offer
Treatment is tailored to you and may take some trial and error. These are the main options in NHS and RCOG guidance.
Talking therapy (CBT)
RCOG says cognitive behavioural therapy should be offered as an option. It won’t change your hormones, but it can help you cope with the thoughts and feelings they bring. In England, if you’re registered with a GP and aged 18 or over (16 in some areas), you can refer yourself to NHS Talking Therapies.
SSRI antidepressants
RCOG lists SSRIs as one of the first-choice treatments for severe PMS. They can be taken every day, or only in the two weeks before a period. A 2024 Cochrane review of 34 trials found SSRIs probably reduce premenstrual symptoms, and probably work better when taken continuously. Side effects such as nausea, low energy and drowsiness are common.
The combined contraceptive pill
Some combined pills, particularly those containing drospirenone, are a first-choice option according to RCOG. They may be taken back to back without the usual break, to smooth out hormone changes. They aren’t suitable for everyone.
Specialist options
If other treatments haven’t helped, a specialist may suggest GnRH analogues. These medicines cause a temporary, reversible menopause. If used for more than 6 months, RCOG advises adding HRT to protect your bones. Surgery to remove the womb and ovaries is a last resort, considered only when everything else has failed.
Already on medication? Don’t stop or change an antidepressant or contraceptive without talking to your GP. And check with a pharmacist before adding any supplement or herbal product, as some interact with antidepressants.
What helps day to day
Self-help won’t cure PMDD, but it can take the edge off and works well alongside treatment. The NHS suggests these for premenstrual symptoms:
- Exercise regularly, including in the luteal phase.
- Eat little and often: smaller meals every 2 to 3 hours.
- Get plenty of sleep. See sleep hygiene and what sleep deprivation does to your mood.
- Reduce stress. Yoga, meditation or breathing exercises such as box breathing.
- Don’t smoke, and don’t drink too much alcohol.
PMDD-specific habits worth trying:
- Mark your luteal days in your calendar and keep them lighter where you can: fewer big decisions, deadlines or difficult conversations.
- Make a plan while you feel well: what helps, who you can call, and what you’ll do if dark thoughts come. Share it with someone you trust.
- Notice caffeine. If it makes you jittery or affects your sleep, cut back in the second half of your cycle.
- Pause before reacting. See how to control anger and how to deal with anxiety.
Research on supplements for general PMS is covered in magnesium for PMS and CBD for PMS. None of them is a treatment for PMDD. If you’d like magnesium as part of an evening wind-down, our Magnesium Glycinate Sleep Complex provides magnesium, which contributes to normal psychological function and to the reduction of tiredness and fatigue. It doesn’t replace anything your GP recommends; check with a pharmacist first if you take an antidepressant or other medicine. We don’t recommend our products during pregnancy or breastfeeding, and they are for adults (18+) only.
Is PMDD a disability in the UK?
It can be. Under the Equality Act 2010, you’re disabled if you have a physical or mental impairment that has a “substantial” and “long-term” negative effect on your ability to do normal daily activities. Substantial means more than minor or trivial. Long-term means it has lasted, or is likely to last, 12 months or more.
PMDD doesn’t need to affect you every day to count. Citizens Advice explains that a condition whose effects come and go can still be covered if those effects are likely to come back within 12 months. Whether PMDD counts depends on how it affects you, not on the name of the condition.
If it does count, ACAS explains that employers must make reasonable adjustments by law. You could, for example, ask about flexible hours or working from home on your worst days. Your symptom diary can help that conversation, and Citizens Advice or ACAS can advise if you’re unsure.
Supporting someone with PMDD
- Believe them. The symptoms are real, even if they disappear a week later.
- Learn the calendar together so the hard days are less of a shock.
- Don’t blame the period in an argument. Talk about patterns on a good day instead.
- Offer practical help on bad days: food, childcare, a quiet evening.
- Take talk of suicide seriously. Ask directly, stay with them, and call 999 or NHS 111 if you’re worried about their safety.
When to get help
See a GP if premenstrual symptoms are affecting your daily life, your work or your relationships, or if lifestyle changes haven’t helped. Don’t wait to finish a two-cycle diary if you’re struggling now.
Get urgent help if you have thoughts of suicide or self-harm. The NHS says to call 999 or go to A&E if you have PMDD symptoms and feel suicidal. For urgent advice, call NHS 111 and choose the mental health option. You can talk to Samaritans any time on 116 123.
If your symptoms don’t follow your cycle, or you’re unsure whether it’s hormones at all, our guide to hormonal imbalance symptoms covers other causes a GP may check. PMDD is also different from PCOS, a separate hormone condition: see PCOS has a new name (PMOS).
FAQs
What is PMDD?
Premenstrual dysphoric disorder is a severe form of PMS. It causes intense emotional symptoms, such as depression, anxiety, irritability or anger, in the 1 to 2 weeks before a period, easing within a few days of it starting.
What is the difference between PMDD and PMS?
PMS is common and mostly physical, with mild mood changes. PMDD is less common and mainly emotional, and it is severe enough to disrupt work, relationships and daily life. PMDD can also bring suicidal thoughts.
How long do PMDD symptoms last?
Usually from a few days up to two weeks each cycle. Symptoms start after ovulation and ease within a few days of your period starting. If they last all month, it may be another condition that gets worse before periods.
How is PMDD diagnosed in the UK?
By tracking your symptoms daily for at least two menstrual cycles and taking the diary to a GP. There is no blood test. Your GP may refer you to a gynaecologist or psychiatrist if needed.
Is PMDD a mental illness?
Yes. PMDD is recognised as a mood disorder in the DSM-5 psychiatric manual. It is linked to how the brain responds to normal hormone changes, and it is treatable.
Is PMDD a disability in the UK?
It can be. Under the Equality Act 2010, it counts if it has a substantial, long-term effect on your daily activities. Effects that come and go can count if they are likely to return within 12 months.
Can PMDD cause suicidal thoughts?
Yes. PMDD is linked to a higher risk of suicidal thoughts. If you feel unsafe, call 999 or go to A&E. For urgent advice call NHS 111 and choose the mental health option, or call Samaritans on 116 123.
Sources
- NHS. PMS (premenstrual syndrome).
- Royal College of Obstetricians and Gynaecologists. Managing premenstrual syndrome (PMS).
- International Association for Premenstrual Disorders (IAPMD). About PMDD.
- Reilly TJ et al (2024). The prevalence of premenstrual dysphoric disorder: systematic review and meta-analysis. Journal of Affective Disorders.
- Jespersen C et al (2024). Selective serotonin reuptake inhibitors for premenstrual syndrome and premenstrual dysphoric disorder. Cochrane Database of Systematic Reviews.
- Yan H et al (2021). Suicidality in patients with premenstrual dysphoric disorder: a systematic review and meta-analysis. Journal of Affective Disorders.
- Yonkers KA, Simoni MK (2018). Premenstrual disorders. American Journal of Obstetrics and Gynecology.
- Hantsoo L, Epperson CN (2015). Premenstrual dysphoric disorder: epidemiology and treatment. Current Psychiatry Reports.
- NHS. Where to get urgent help for mental health.
- NHS. NHS Talking Therapies.
- GOV.UK. Definition of disability under the Equality Act 2010.
- Citizens Advice. What counts as disability.
- ACAS. Reasonable adjustments at work.
- Samaritans. Contact Samaritans.
This guide is general information, not medical advice. If you’re worried about your mental health, speak to your GP. Evopure makes the Magnesium Glycinate Sleep Complex.
