PMDD: More Than Bad PMS, and How to Treat It

The short answer: PMDD (premenstrual dysphoric disorder) is the severe end of premenstrual illness. What makes it PMDD is not unusual symptoms. It is that at least one strong mood symptom leads, the symptoms come in the week or two before your period, and they lift within a few days of bleeding starting. It is diagnosed with a daily diary kept over two cycles, not a blood test. It is treatable, and the mood symptoms are a medical problem, not a weakness in you.

What is PMDD, and how is it different from PMS?

Almost every woman gets some premenstrual symptoms. That is normal. PMS is when those symptoms start to interfere with your life. PMDD is the severe end, where mood symptoms lead and you cannot carry on as usual.

The Royal College of Obstetricians and Gynaecologists classifies premenstrual disorders by severity rather than as separate illnesses. Mild premenstrual symptoms do not disturb your work or your relationships. Moderate ones do, but you manage. Severe means you withdraw from people and cannot function normally.

So the question is not whether your symptoms are unusual. The question is how much they take from you, and whether mood is at the centre of it.

The timing rule that matters most

This is the single most useful thing on this page. In PMDD, symptoms follow the cycle closely. They arrive in the week or two before your period. They start easing within a few days of bleeding starting. In the week after your period, they are minimal or gone.

If your low mood never fully lifts, and it is there in the week after your period too, that is important information. It points away from PMDD and towards depression or anxiety that needs its own treatment. That is not worse news. It just means we treat the right thing.

The five-symptom rule doctors use

Psychiatrists diagnose PMDD using a checklist. You need at least five symptoms in the week before your period. At least one of them must be a mood symptom from the first list below.

This is the part popular articles get wrong. Five physical symptoms on their own are not PMDD. At least one of your symptoms has to be a mood symptom. It does not have to be your worst symptom, it just has to be there.

The symptoms also have to disturb your life in a real way, at work, at home, or with the people you love. And they must be tied to your cycle rather than being a flare-up of something else.

How common is PMDD really?

You will see very large numbers online. Most of them come from studies that asked women to remember backwards, which overstates it.

The most careful review we have, published in 2024, pooled 44 studies covering more than 50,000 women. When the diagnosis was properly confirmed with a daily diary, about 3 in 100 women had PMDD. In general community samples it was under 2 in 100. When studies used a one-time questionnaire instead, the figure roughly doubled.

An Indian review pooled studies of mostly college and nursing students. It found about 4 in 10 had PMS, and about 8 in 100 met criteria for PMDD. Those were largely questionnaire studies in young students, so the true figure in the general population is likely lower. It does tell us this is common in young women, and that it is under-discussed here.

I want to be careful about one thing. No study shows PMDD is more common in India than elsewhere. What we do have is more silence around it.

How is PMDD diagnosed?

There is no blood test for PMDD. The diagnosis comes from your own record of your symptoms, kept as they happen.

The RCOG is direct about this. Symptoms should be recorded going forward, over two cycles, using a symptom diary, because remembering backwards is not reliable. A well-established tool is the Daily Record of Severity of Problems, but a simple notebook works too.

Here is what I ask women to write each evening: the date, where you are in your cycle, every symptom from the list above that you had that day, a score out of ten for each, and how much they disturbed your work, your home or your relationships. Recording every symptom matters, because the diagnosis depends on how many you have and when they come, not just on the worst one. Two months of that tells me more than any test. If you are not sure where you are in your cycle, my free ovulation and cycle calculator helps you map the dates.

What the blood tests are actually for

I do order tests, but not to diagnose PMDD. They are to rule out the conditions that imitate it. A thyroid problem can cause low mood, tiredness and irregular cycles. Low haemoglobin can cause exhaustion that gets worse around your period. Depression or anxiety that runs all month is a different diagnosis.

If you want to understand those two mimics better, I have written a full guide to thyroid problems in women and one on iron deficiency and anaemia. Both are common in Indian women and both are easy to check.

Which treatments actually work?

Quite a lot works. That is the good news I most want you to take from this page.

The medicine that surprises people

The strongest medicine evidence is for a type of antidepressant called an SSRI. A 2024 Cochrane review found it probably reduces premenstrual symptoms overall.

Here is the part that surprises people. When these tablets are used for depression, they take weeks to build up an effect. In PMDD the effect comes on much faster. That is the reason they can be taken only in the second half of the cycle at all. The same Cochrane review found that taking them right through the month probably works a little better than the two-week version, which is a change from older advice.

I am not going to name a drug or a dose here. That is your doctor's decision, made with your history in front of her. Side effects are real, nausea being the commonest, and they are worth discussing openly.

Therapy is not the soft option

The RCOG says talking therapy should be offered as a treatment option for premenstrual symptoms. In a head-to-head trial against medicine, the tablets worked faster, but a year later the therapy group had held their improvement better. Combining the two added nothing over either alone.

Since stress makes every premenstrual week harder, the practical habits in my guide to managing stress sit well alongside whichever treatment you choose.

The pill, but only certain ones

Not every contraceptive pill helps. The ones with evidence for severe premenstrual symptoms contain a progestogen called drospirenone, and they often work better taken continuously without the usual break. Older pills have not shown the same benefit, and the progestogen in them may reproduce premenstrual symptoms.

One safety point that matters. These are combined pills, meaning they contain estrogen, and they are not suitable for everyone. Before prescribing one, a doctor should check your blood pressure and ask about clots, migraine with aura, smoking, breast or liver disease, and whether you have recently had a baby. This is not a tablet to borrow from a friend or order online.

What does not work, honestly

Progesterone tablets and creams were a standard treatment for years. When Cochrane reviewed the trials, they did not show that progesterone works for premenstrual symptoms, and they did not show that it does not either. The evidence simply is not there. So if you are on one and it is not helping you, that is worth a conversation rather than years of hoping.

Vitamin B6 is heavily promoted, but the evidence behind it is weak and contradictory, and high doses carry a real risk of nerve damage. Evening primrose oil helps cyclical breast tenderness, not mood.

For very severe cases that have not responded to anything, there is a treatment that switches the cycle off temporarily, like a short menopause. It works, but it weakens bone over time, so it is given with add-back hormones and reserved for the most severe situations.

I need to say plainly why that box is there. Women with PMDD are several times more likely to have suicidal thoughts than women without it. A 2021 review found the risk of a suicide attempt was around seven times higher, and of suicidal thoughts around four times higher. That goes with the condition, not with any flaw in your character, and it is treatable.

A word about being believed

Women often tell me they were called moody, dramatic, or difficult for years before anyone used the word PMDD. Some were told this is simply what being a woman is. In my clinic I see how much damage that does, and how much relief comes from a name and a plan.

You do not have to prove your suffering to anyone. You bring a diary, we look at the pattern, and we treat it. If your cycles are also irregular, my complete guide to irregular periods covers the common reasons why.

Your questions, answered

Is PMDD just severe PMS?

Close, but not quite. PMDD sits at the severe end of the same scale, and what defines it is that a strong mood symptom leads, with at least five symptoms in total, timed to the week before your period. Severe physical symptoms alone would not be called PMDD.

Is PMDD a hormone imbalance?

No, and this is a common misunderstanding. The problem is not the hormone levels themselves. Some women are simply more sensitive to the normal hormone changes of the cycle. That is also why a blood hormone test cannot diagnose it.

Can a blood test tell me if I have PMDD?

No test diagnoses PMDD. Tests are used to rule out thyroid problems, anaemia, and other conditions that look similar. The diagnosis itself comes from your daily diary over two cycles.

Will I have to take medicine forever?

Not necessarily. Some women take an SSRI only in the second half of each cycle. Others use it for a stretch of months and then stop with their doctor's guidance. Therapy tends to hold its benefit after it ends, which is one of its advantages.

Does PMDD go away after pregnancy or at menopause?

PMDD symptoms are driven by the cycle, which is why treatments that switch the cycle off relieve them. The months after delivery carry their own separate mental health risks, so if you are pregnant or recently delivered, my guide to postpartum depression is the more relevant one. Talk to your own doctor about what to expect as you approach menopause.

My family thinks I am just being difficult. What do I say?

Show them the diary rather than arguing. A pattern that repeats on the same days each month is hard to dismiss as temperament. Many families change their view when they see it written down. You are also welcome to bring a family member into a consultation with me.

Sources for this article (9)

1. Reilly et al., The prevalence of premenstrual dysphoric disorder: systematic review and meta-analysis, Journal of Affective Disorders, 2024 (accessed July 2026)
2. RCOG, Management of Premenstrual Syndrome, Green-top Guideline No. 48 (accessed July 2026)
3. Jespersen et al., Selective serotonin reuptake inhibitors for premenstrual syndrome, Cochrane Database of Systematic Reviews, 2024 (accessed July 2026)
4. Premenstrual Dysphoric Disorder, StatPearls, NCBI Bookshelf (accessed July 2026)
5. Prasad et al., Suicidal risk in women with premenstrual syndrome and premenstrual dysphoric disorder, Journal of Women's Health, 2021 (accessed July 2026)
6. Ford et al., Progesterone for premenstrual syndrome, Cochrane Database of Systematic Reviews (accessed July 2026)
7. Dutta and Sharma, Prevalence of premenstrual syndrome and PMDD in India, Health Promotion Perspectives, 2021 (accessed July 2026)
8. Management of Premenstrual Dysphoric Disorder: a scoping review, 2022 (accessed July 2026)
9. Tele-MANAS, national tele mental health helpline, Ministry of Health and Family Welfare, Government of India (accessed July 2026)

This article is for your information and learning. It is not a substitute for a consultation. For advice about your own health, talk to me or your own doctor.