PMDD vs PMS: What Is the Difference?

Part of our Women's Mental Health articles. For evaluation and medication management, see women's mental health care at Ridge Way.

PMS is a set of physical and emotional symptoms in the week or two before a period, and most women get some. PMDD is a psychiatric diagnosis on the same schedule. It brings severe irritability, depression or anxiety that disrupts daily life, then clears within days of the period starting. The difference is severity and impact, and PMDD has specific treatment.

What Is the Difference Between PMDD and PMS?

The Office on Women’s Health describes PMS as a set of symptoms many women get a week or two before their period. It notes that over 90% of women report some premenstrual symptoms, such as bloating, headaches and moodiness.

PMDD is “a health problem that is similar to premenstrual syndrome (PMS) but is more serious. PMDD causes severe irritability, depression, or anxiety in the week or two before your period starts.” It “affects up to 5% of women of childbearing age.”

So the two share a calendar and differ in weight. The emotional symptoms of PMDD are the center of the condition, not a side effect of the physical ones. They are severe enough to change how you function during that part of every month.

What Are the Symptoms of PMDD?

The Office on Women’s Health lists the mood symptoms of PMDD as lasting irritability or anger, sadness or despair, and tension or anxiety. Panic attacks, mood swings, frequent crying and sometimes thoughts of suicide are on the list too. Others include losing interest in daily life, trouble focusing, low energy, food cravings or binge eating, poor sleep and feeling out of control. Physical symptoms such as cramps, bloating, breast tenderness, headaches and joint or muscle pain can come too. If your symptoms include thoughts of suicide, call or text 988 now.

Read that list against the PMS list and the overlap is real. What separates them is the first half. Irritability that damages relationships, despair, panic and feeling out of control are not what most people mean by moodiness.

One item on the list is different in kind. If the sadness includes thoughts of suicide, do not track it on a calendar. Call or text 988 now, and call 911 if you are in immediate danger. Then get evaluated. StatPearls reports that PMDD is strongly linked to suicidal thoughts and behavior, and that risk deserves care.

How Is PMDD Diagnosed?

The Office on Women’s Health says your provider will ask about your health history and do a physical exam. It adds that “you will need to keep a calendar or diary of your symptoms to help your doctor diagnose PMDD. You must have five or more PMDD symptoms, including one mood-related symptom, to be diagnosed.”

The formal criteria say the same thing with more precision. In the DSM-5, at least five symptoms must be present in the final week before a period, start to improve within a few days after it starts, and be minimal or gone the week after. That pattern has to hold in most cycles over the past year. It “should be confirmed by prospective daily ratings during at least two symptomatic cycles,” though a provisional diagnosis can be made before that.

Prospective is the important word. A diary kept as it happens is reliable. Recalling a whole month at one visit is not, which is why the criteria ask for daily ratings. A psychiatric evaluation for PMDD is built on two months of daily notes. One line a day on mood, energy, sleep and anything that went wrong is enough.

The same diary rules other things in or out. The Office on Women’s Health notes that depression and anxiety disorders overlap with PMS more than any other conditions. Their symptoms may get worse before or during a period. If the low mood is there all month and worse for a week, that is a different diagnosis with a different plan.

How Is PMDD Treated?

The Office on Women’s Health lists two FDA-approved treatments. The first is a group of antidepressants called SSRIs, with sertraline, fluoxetine and paroxetine approved for PMDD. For paroxetine, the approval covers the controlled-release form only.

The second is a birth control pill containing drospirenone and ethinyl estradiol. That approval belongs to a specific formulation, for people who also want oral contraception. Not every pill with those ingredients carries it.

SSRIs are the antidepressant class covered on our antidepressants page. Antidepressants carry a boxed warning. NIMH notes that some people under 25 may have more suicidal thoughts or behavior on them, especially early on or after a dose change. The FDA advises that patients of all ages be watched closely during that time. If new or worse suicidal thoughts appear, call or text 988 and tell your prescriber the same day.

How an SSRI is used for PMDD is a decision for the evaluation. That includes whether it is taken all month or only in the second half of the cycle.

The Office on Women’s Health also lists over-the-counter pain relievers for the physical symptoms, along with stress management and changes to diet and exercise. It notes that PMDD can be serious enough that some women should see a doctor or nurse about treatment.

Ridge Way provides the evaluation and the medication management. The birth control route is usually managed with a gynecologist or primary care provider. We will say so if that is the better fit for you. Our women’s mental health page describes what we treat.

When Should You See Someone About Premenstrual Symptoms?

The Office on Women’s Health advises talking to a doctor or nurse if PMS symptoms bother you or affect daily life. That is a low bar on purpose. You do not need to be sure it is PMDD to ask. The diary and the evaluation are how that gets decided.

You do not need a referral unless your insurance plan requires one. Request an appointment and we will usually call you back within one business day.

Start the diary before the appointment if you can. Two cycles of daily notes turn a first visit from “let’s track this and come back” into a conversation about treatment. If two cycles is longer than you can wait, book anyway. The DSM-5 criteria state that the diagnosis may be made provisionally before the diary confirms it.

And if the pattern turns out not to follow the cycle, that is a useful answer too. Depression and anxiety that are present all month and worse for a week are treatable in their own right. Our post on postpartum depression covers another point in reproductive life where mood symptoms are often written off as expected.

Wondering whether what you are noticing is worth raising? Our free screening tools take about two minutes each and are a starting point, not a diagnosis.