PMDD: Symptoms, Diagnosis and Treatment

What is PMDD?

Premenstrual dysphoric disorder (PMDD) is a severe form of premenstrual distress in which mood symptoms dominate. Symptoms start in the week or two before a period, improve within a few days of bleeding starting, and are minimal or absent in the week after. It is recognised as a medical diagnosis in its own right, not as “bad PMS”.^1,2

How common is PMDD?

Less common than it sometimes looks online. A meta-analysis of 44 studies found that when the diagnosis was properly confirmed with daily symptom ratings, about 3 in 100 menstruating women had PMDD, and about 1.6 in 100 in community samples. Studies that relied on a one-off questionnaire produced much higher figures.³

PMDD symptoms

At least one of these mood symptoms is present in most cycles:^1,2

• Marked mood swings, sudden sadness or sensitivity to rejection
• Marked irritability, anger or conflict with others
• Depressed mood, hopelessness or harsh self-criticism
• Marked anxiety, tension or feeling on edge

Alongside these, people often have trouble concentrating, tiredness, changes in appetite or sleep, a sense of being overwhelmed or out of control, and physical symptoms such as bloating, breast tenderness and joint or muscle pain.

Many people describe feeling like a different person for part of each month, then returning to themselves once their period starts.

PMDD vs PMS

PMS and PMDD share the same timing and many of the same symptoms. The difference is severity and the central role of mood. In PMDD the symptoms cause real damage to work, study or relationships in most cycles.¹

There is also a third pattern. Depression, anxiety and other conditions can get worse before a period without ever fully clearing. That is called premenstrual exacerbation, and it is treated differently, which is one reason accurate diagnosis matters.^2,8

What causes PMDD?

PMDD is not a hormone imbalance, and hormone blood tests are normal. The brain reacts differently to the usual rise and fall of ovarian hormones. This was first shown in an experiment where women with and without severe premenstrual symptoms were given identical hormones: only the women with a history of symptoms became unwell. The finding was repeated in 2025 in women who met the full criteria for PMDD.^4,5

How is PMDD diagnosed?

By tracking symptoms every day for at least two cycles. The pattern has to show symptoms before the period and a clear symptom-free stretch afterwards. A doctor will also check for other conditions, including thyroid problems, depression and anxiety.^2,6

PMDD and suicidal thoughts

PMDD carries real risk. A meta-analysis found that people with PMDD were about twice as likely to have suicidal thoughts and to attempt suicide as those without it.⁷

If you are having thoughts of suicide, call Lifeline on 13 11 14 at any time, or 000 in an emergency. If these thoughts follow your cycle, tell your doctor, because that pattern points to a treatable cause.

PMDD treatment

• Prescription medicines that act on serotonin. The best-established treatment. In PMDD they often work within days, so some people take them only in the second half of the cycle^1,6
• Hormonal treatments. Some forms of hormonal contraception help. Treatments that pause the cycle altogether are used for severe PMDD under specialist care^1,6
• Cognitive behavioural therapy. May improve coping and functioning, though the evidence is lower quality⁹
• Lifestyle measures. Exercise, regular sleep and less alcohol help some people, but are rarely enough alone for PMDD

Treatment is usually stepped, starting with the simplest option and reviewing after two or three cycles.⁶

When to see a doctor

See a doctor if your mood changes sharply before most periods, or if premenstrual symptoms are harming your work or relationships. Take your symptom diary with you. The International Association for Premenstrual Disorders has free tracking tools and peer support.⁸

References

1. Yonkers KA, O'Brien PM, Eriksson E. Premenstrual syndrome. Lancet. 2008;371(9619):1200-10.
2. Ismaili E, Walsh S, O'Brien PMS, et al. Fourth consensus of the International Society for Premenstrual Disorders (ISPMD): auditable standards for diagnosis and management of premenstrual disorder. Arch Womens Ment Health. 2016;19(6):953-958.
3. Reilly TJ, Patel S, Unachukwu IC, et al. The prevalence of premenstrual dysphoric disorder: Systematic review and meta-analysis. J Affect Disord. 2024;349:534-540.
4. Schmidt PJ, Nieman LK, Danaceau MA, et al. Differential behavioral effects of gonadal steroids in women with and in those without premenstrual syndrome. N Engl J Med. 1998;338(4):209-16.
5. Wei SM, Wakim P, Martinez PE, et al. Differential Effects of Ovarian Steroids in Women With and Without Premenstrual Dysphoric Disorder: A Replication and Extension of Findings. Am J Psychiatry. 2025;182(10):922-934.
6. . Management of Premenstrual Syndrome: Green-top Guideline No. 48. BJOG. 2017;124(3):e73-e105.
7. Yan H, Ding Y, Guo W. Suicidality in patients with premenstrual dysphoric disorder-A systematic review and meta-analysis. J Affect Disord. 2021;295:339-346.
8. International Association for Premenstrual Disorders. About PMDD and PME.
9. Busse JW, Montori VM, Krasnik C, et al. Psychological intervention for premenstrual syndrome: a meta-analysis of randomized controlled trials. Psychother Psychosom. 2009;78(1):6-15.