Why Am I Feeling Irritable Before My Period? PMDD, PMS and What to Track

For two weeks every month, do the people you love suddenly get on your nerves?

Your hormones are almost certainly normal. That is exactly the problem.

There is a particular kind of exhaustion that does not show up on a blood test.

It starts somewhere after ovulation. At first, the change can be subtle. You become more easily irritated. Things you would normally brush off suddenly get under your skin. A comment from your partner, a question from a colleague, something small that should not matter. You feel yourself reacting far more strongly than the situation seems to deserve.

The hardest part is that you know the people around you mean well. You know your partner is not trying to annoy you. You know the people you love have not suddenly become different people. But for two or three weeks of the month, it can feel as though everything they say or do lands badly. You snap, withdraw, become impatient and afterwards you feel guilty because you cannot understand why you reacted that way.

Things that were manageable on Tuesday can feel unbearable by the following Monday. You cancel plans you were looking forward to, like going to the Pretoria Farmers Market.

You sit down to work and cannot make your mind hold onto what is in front of you. Your body may feel swollen, uncomfortable or unfamiliar.

And somewhere in the middle of it, a frightening thought can creep in:

Why am I like this?

Then your period starts.

Within a few days, the fog begins to lift. The irritation eases. You feel more patient, more capable, more like yourself again. Looking back, you may wonder whether you were simply stressed, being unreasonable, or overreacting.

And then, the following month, it happens again.

If you recognise yourself in that pattern, this article is for you.

It is not a diagnosis, and it is not a substitute for seeing a qualified healthcare practitioner. It is an evidence-based look at what peer-reviewed research currently tells us about severe cyclical premenstrual symptoms, what the evidence does not support, and what you can practically start doing this week to better understand your own pattern.

PMS or PMDD? Where “common” becomes clinical

If you notice that your mood, energy or body changes before your period, you are far from alone. Most menstruating women experience at least one premenstrual symptom. Estimates suggest that around 80 - 90% experience at least one mild premenstrual symptom, while roughly 30 - 40% experience premenstrual syndrome (PMS) severe enough to cause meaningful distress or interfere with daily life (Nexha et al., 2024).

But premenstrual dysphoric disorder, or PMDD, is different. PMDD is not simply “really bad PMS”. It is a recognised diagnostic condition in the DSM-5 and is also recognised in the ICD-11 under code GA34.41. It is cross-listed with depressive disorders because mood symptoms are such a prominent part of the condition (Naik et al., 2023). That distinction matters, especially if your main experience is not physical discomfort but feeling unusually irritable, angry, anxious, overwhelmed or unlike yourself for part of every month.

What are the diagnostic criteria for PMDD?

PMDD requires at least five symptoms during the luteal phase, the roughly two weeks between ovulation and the start of your period, and at least one must come from the four core mood-related symptoms (Nexha et al., 2024; Sundström-Poromaa & Comasco, 2023).

At least one of these four core symptoms must be present

• Marked mood swings, sudden tearfulness or heightened sensitivity to rejection

• Marked irritability, anger or increased conflict with other people

• Marked depressed mood, hopelessness or self-critical thoughts

• Marked anxiety, tension or feeling keyed up or on edge

For the diagnosis to reach the required threshold, additional symptoms can include:

• Loss of interest in your usual activities

• Difficulty concentrating

• Fatigue or a marked lack of energy

• Changes in appetite or specific food cravings

• Insomnia or sleeping too much

• Feeling overwhelmed or out of control

• Physical symptoms such as breast tenderness, bloating, joint or muscle pain, or weight gain.

  
  

For the woman we have been describing, one point here is especially important: irritability and interpersonal conflict are not side notes in PMDD. They are part of the core diagnostic picture.

If you find yourself becoming far more irritated with your partner, family or colleagues before your period , and then wondering afterwards why you reacted so strongly , that pattern deserves attention.

It does not automatically mean you have PMDD. But it is relevant information.

What separates PMDD from ordinary premenstrual symptoms?

Two things matter most: timing and impact.

1. Timing

In PMDD, symptoms follow a cyclical pattern. They occur during the luteal phase, begin to improve within a few days after bleeding starts, and are minimal or absent in the week after your period (Hantsoo & Epperson, 2015). Symptoms typically reach their worst point around three to four days before menstruation and may remain severe for roughly three days after bleeding begins (Hantsoo & Epperson, 2015). That pattern is one reason you may spend part of the month thinking, “I cannot cope with anyone,” and another part wondering whether you imagined how bad it was.

2. Impact

The symptoms also need to matter in your actual life. They must cause significant distress or interfere with work, studies, relationships or your social life (Naik et al., 2023). In other words, the question is not simply:

“Do I feel irritable before my period?”

It is:

“Does this change the way I work, relate to people, make decisions or function for a meaningful part of every month?”

That is a much more useful question.

Feeling irritable before your period can be a major PMDD symptom

It is worth noticing that mood lability and irritability appear before depressed mood in the DSM-5 criteria. That was deliberate. These symptoms are considerably more common in PMDD than low mood is (Hantsoo & Epperson, 2015).

So if you have looked at depression checklists and thought, “This does not sound like me - I am not necessarily depressed, I am just angry, agitated and overwhelmed,” that may help explain why PMDD has not seemed obvious.

For some women, the dominant experience is not sadness.

It is becoming unusually reactive with the people closest to them, feeling constantly on edge, and then feeling guilty when the difficult part of the cycle passes.

How common is PMDD?

The answer depends heavily on how it is diagnosed. A 2024 systematic review and meta-analysis examined 44 studies involving 50,659 participants. It found a pooled PMDD prevalence of 7.7% when the diagnosis was provisional, but only 3.2% when the diagnosis was confirmed through prospective symptom monitoring.

When researchers looked only at community samples with a confirmed diagnosis, the prevalence was 1.6% (Reilly et al., 2024). These are international pooled estimates, not South African prevalence figures. But the difference between 7.7% and 3.2% is extremely important wherever you live.

Why?

Because what you remember about last month and what you record every day across your

cycle are not always the same thing.

Hold onto that gap.

It is one of the most practically useful facts in this article, and we are going to come back to it.

When this is more than a difficult week

For some women, the premenstrual shift goes beyond irritability, arguments or feeling unlike themselves.

It can become frightening.

If there are days in your cycle when your thoughts become much darker, when you feel hopeless, trapped, or frightened by what is going through your mind, that deserves to be taken seriously.

If you are having suicidal thoughts in South Africa

If you are thinking about harming yourself, feel that you may not be able to keep yourself safe, or are frightened by the thoughts you are having, seek help immediately.

In South Africa, you can contact the South African Depression and Anxiety Group (SADAG) Suicide Crisis Helpline on 0800 567 567, available 24 hours a day.

If you believe you are in immediate danger, go to your nearest hospital emergency department or ask someone you trust to help you get there.

If the thoughts are not an immediate emergency but appear repeatedly during a particular part of your menstrual cycle, tell a healthcare practitioner about that pattern specifically. Record when the thoughts begin, when they ease, and where you are in your cycle.

That information matters.

Cyclical suicidal thoughts can occur in PMDD, but they should never be dismissed as something you simply have to endure until your period starts.

They are a reason to seek proper assessment and support.

The single most useful thing you can do this week

Remember the gap between 7.7% and 3.2%? That difference tells us something important about diagnosing PMDD: how you record your symptoms matters.

How is PMDD diagnosed?

PMDD cannot be reliably identified from memory alone. When women are asked to look back and remember how they felt over the previous month, their recollection does not always match what daily symptom records show. Retrospective reporting is more prone to false positives and overdiagnosis, which is one reason studies relying on recalled symptoms tend to produce higher prevalence estimates (Naik et al., 2023; Reilly et al., 2024).

That is why prospective symptom tracking is so important.

Diagnostic frameworks recommend recording symptoms every day across at least two symptomatic menstrual cycles. Both the DSM-5 and the International Society for the Study of Premenstrual Disorders (ISPMD) specify prospective monitoring across two cycles, and the Royal College of Obstetricians and Gynaecologists (RCOG) guideline also recommends prospective symptom recording (Hantsoo & Epperson, 2015; RCOG, 2017; Sundström-Poromaa & Comasco, 2023).

That may sound tedious.

It is not unnessesary admin.

Those two months of data can answer questions that a once-off blood test or a conversation based on memory cannot.

1. Tracking can help distinguish PMDD from PME

PMDD is not the only condition in which mood symptoms become worse before a period.

Premenstrual exacerbation (PME) occurs when an existing condition, such as a mood disorder, becomes worse during the premenstrual phase. The distinction lies partly in what happens during the rest of the month.

With PMDD, symptoms typically become minimal or absent after menstruation. With PME, the underlying symptoms continue throughout the cycle but become noticeably worse before the period. The ISPMD classifies PME as a variant premenstrual disorder rather than a core premenstrual disorder.

Daily tracking across the entire menstrual cycle is what helps reveal the difference.

That matters for the woman who feels irritable, agitated or unlike herself for two or three weeks of the month.

The useful question is not only:

“How bad did I feel before my period?”

It is also:

“Did I genuinely return to my usual baseline afterwards?”

2. The symptom diary is part of the diagnostic process

One of the most commonly used validated tools is the Daily Record of Severity of Problems, or DRSP. The DRSP tracks PMDD-related symptoms every day, including mood changes, irritability, depression, anxiety, concentration, energy, sleep, appetite and physical symptoms.

It also records how those symptoms affect your work, relationships and social life.

Symptoms are rated on a scale from 1 to 6, and when the DRSP is completed prospectively across two cycles, alongside assessment for other possible diagnoses, it can be used to evaluate the pattern against DSM-5 criteria.

In other words, you are not simply keeping a wellness journal.

You are collecting clinically useful information about when your symptoms happen, how severe they become, and what they interfere with.

3. Tracking can make your consultation far more useful

Imagine trying to explain two difficult weeks of the month from memory. You may remember the argument with your partner. You may remember feeling furious with a colleague who had done very little wrong.

You may remember cancelling plans because you could not tolerate being around anyone.

But once your period arrives and you begin to feel like yourself again, the intensity can become surprisingly difficult to reconstruct.

That is exactly why daily data matters.

Arriving at a consultation with two complete cycles allows you to show a GP, gynaecologist or other qualified healthcare practitioner a pattern rather than trying to describe one from memory.

Instead of saying:

“I get really irritable before my period.”

you may be able to say:

“My irritability starts around Day 17, becomes severe for eight or nine days, affects my relationship and work, and then drops back to almost nothing a few days after my period starts.”

That is much more useful clinical information.

PMDD can be missed or mistaken for other conditions, and diagnosis may be delayed as a result.

Prospective symptom data helps give your practitioner something concrete to assess.

What should you do this week?

Do not try to work out from memory whether you “probably have PMDD”.

Start recording what actually happens.

Track your symptoms every day — including the days when you feel completely fine.

Those good days matter just as much as the difficult ones, because they establish your baseline and help show whether the change really is cyclical.

Two cycles.

One short check-in every day.

Then take the pattern to someone qualified to interpret it.

How to start tracking tonight

You do not need an app, a spreadsheet or a complicated system.

Take one minute at roughly the same time every evening and record one line for the day.

The aim is simple: capture what happened while it is still fresh, rather than trying to reconstruct the month afterwards.

What to track	What to record
Date and cycle day	Day 1 = first day of full menstrual bleeding
Bleeding	None / spotting / light / moderate / heavy
Mood swings or tearfulness	Rate 1 (none) to 6 (extreme)
Irritability, anger or conflict	Rate 1 (none) to 6 (extreme)
Depressed mood or hopelessness	Rate 1 (none) to 6 (extreme)
Anxiety, tension or feeling on edge	Rate 1 (none) to 6 (extreme)
Concentration	Rate 1 (none) to 6 (extreme)
Energy or fatigue	Rate 1 (none) to 6 (extreme)
Sleep	Hours slept + quality
Appetite or cravings	Rate 1 (none) to 6 (extreme)
Physical symptoms	Bloating, breast tenderness, headaches, muscle or joint pain
Impact today	Did this affect your work, home life, relationships or social plans? Yes / No

For the woman who is trying to understand why she becomes so much more irritated with the people around her, the “impact today” line matters just as much as the symptom score.

A rating of “5” tells you the irritability was severe.

Writing “argued with my partner over something I would normally let go” tells you what that severity looked like in real life.

Two rules make the tracking useful

1. Record it on the same day

Do not fill in several days from memory at the end of the week. Retrospective recall is exactly what prospective monitoring is designed to avoid. If you reconstruct several days afterwards, you reintroduce the same recall bias that can make cyclical symptoms harder to assess accurately. If you miss a day, leave it blank and continue the next day.

2. Track the good days too

Do not only record symptoms during the week when you feel irritable, anxious or overwhelmed. Track every day of the menstrual cycle, including the days when you feel calm, productive and completely like yourself. Those better days establish your baseline.

That baseline is important because a clinician is not only looking for severe symptoms. They are looking for a pattern of symptoms that changes across the menstrual cycle. For example, the useful pattern may look less like:

“I am an irritable person.”

and more like:

“My irritability is usually 1 or 2 out of 6, rises to 5 or 6 during the second half of my cycle, starts affecting my relationship, and then falls again after my period begins.”

That is the kind of pattern prospective tracking can reveal.

Do you need a formal PMDD symptom tracker?

For formal assessment, ask your GP, gynaecologist or other qualified healthcare practitioner about using the Daily Record of Severity of Problems (DRSP) or another validated prospective symptom-rating tool. The table above is a practical way to start observing your pattern tonight, but it is not intended to replace a validated diagnostic instrument or a clinical assessment. The important thing is to begin.

Two complete cycles. A brief entry every day. Good days included. Then take the record with you when you speak to a healthcare practitioner.

You do not need to arrive with a diagnosis.

You need to arrive with a pattern.

When should you stop self-managing and book an appointment?

Tracking your cycle can give you useful information. But there comes a point where collecting data is no longer enough. You do not need to be certain that you have PMDD before speaking to a healthcare practitioner.

Consider booking a consultation if any of the following apply:

• You are having thoughts of suicide or self-harm. Do not wait for your period to start or for the symptoms to pass. Seek urgent support.

• Your symptoms are affecting your work, studies, parenting, relationship or social life.

• You find yourself repeatedly becoming so irritable, angry or overwhelmed that it is damaging relationships with people you care about.

• You have tracked your symptoms across two menstrual cycles and can see a clear, recurring pattern.

• Your symptoms remain significant throughout the month rather than becoming minimal after menstruation. This may point towards premenstrual exacerbation (PME) or another condition that needs to be assessed rather than assumed to be PMDD (Biggs, Romeu & Gaudard, 2025).

• You have tried reasonable self-management strategies for two or three cycles and they have made little meaningful difference.

• You are already receiving treatment but your symptoms remain severe or disruptive.

You also do not have to wait until things become unbearable.

If you are losing two or three weeks of every month to irritability, agitation, exhaustion, anxiety or feeling unlike yourself, that is already useful information to bring to a GP, gynaecologist or other appropriately qualified healthcare practitioner.

Bring your symptom record with you if you have one.

If you have not started tracking yet, that should not stop you from booking. A practitioner can help you decide what needs to be monitored and what else may need to be ruled out.

What to take from this

If there are weeks every month when you barely recognise the way you think, feel or react to the people around you, it is worth investigating. Especially when the pattern keeps repeating. You may spend part of the month thinking:

“Why am I so irritated with everyone?”

Then your period arrives, you begin to feel like yourself again, and you wonder whether you simply overreacted. That cycle can make it very easy to blame your personality. But severe cyclical symptoms deserve a better explanation than “this is just who I am.” If PMDD is part of the picture, research suggests that the issue is not usually an obvious excess or deficiency of circulating ovarian hormones. Instead, the brain appears to respond differently to the normal hormonal changes that occur across the menstrual cycle.

That distinction matters. It means a normal hormone blood test does not automatically explain away what you are experiencing, and it means the answer is unlikely to be as simple as buying something that promises to “balance your hormones”.

Start by looking for the pattern. Track your symptoms every day, including the days when you feel completely like yourself. Do it for two menstrual cycles if you can.

Then take that information to someone qualified to interpret it. You do not need to arrive knowing whether it is PMDD. You do not need to convince anyone that your symptoms are “bad enough”. You need to be able to say:

“This keeps happening. It is affecting my life. I want to understand why.”

That is enough reason to start the conversation.

Ready to understand your pattern?

If cyclical mood changes, irritability or other premenstrual symptoms are affecting your work, relationships or quality of life,

Join the Circle

Important

This article provides general health information and is not medical advice, diagnosis or treatment. It cannot take your individual medical history, current medication or circumstances into account. Speak to an appropriately qualified healthcare practitioner before starting, stopping or changing medication, supplements or other treatment.

If you are experiencing thoughts of suicide or self-harm, seek help immediately. In South Africa, the SADAG Suicide Crisis Helpline is available 24 hours a day on 0800 567 567. If you believe you are in immediate danger, go to your nearest hospital emergency department or ask someone you trust to help you get there.

Reference list

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2. Hantsoo, L. & Epperson, C.N. 2015. Premenstrual Dysphoric Disorder: Epidemiology and Treatment. Current Psychiatry Reports. 17(11):87.

3. Hantsoo, L. & Epperson, C.N. 2020. Allopregnanolone in premenstrual dysphoric disorder (PMDD): Evidence for dysregulated sensitivity to GABA-A receptor modulating neuroactive steroids across the menstrual cycle. Neurobiology of Stress. 12:100213.

4. Naik, S.S., Nidhi, Y., Kumar, K. & Grover, S. 2023. Diagnostic validity of premenstrual dysphoric disorder: revisited. Frontiers in Global Women’s Health. 4:1181583.

5. Nexha, A., Caropreso, L., De Azevedo Cardoso, T., Suh, J.S., Tonon, A.C. & Frey, B.N. 2024. Biological rhythms in premenstrual syndrome and premenstrual dysphoric disorder: a systematic review. BMC Women’s Health. 24(1):551.

6. Osborn, E., Brooks, J., O’Brien, P.M.S. & Wittkowski, A. 2021. Suicidality in women with Premenstrual Dysphoric Disorder: a systematic literature review. Archives of Women’s Mental Health. 24(2):173–184.

7. Reilly, T.J., Patel, S., Unachukwu, I.C., Knox, C.-L., Wilson, C.A., et al. 2024. The prevalence of premenstrual dysphoric disorder: Systematic review and meta-analysis. Journal of Affective Disorders. 349:534–540.

8. Royal College of Obstetricians and Gynaecologists (RCOG). 2017. Management of Premenstrual Syndrome. Green-top Guideline No. 48. BJOG: An International Journal of Obstetrics & Gynaecology. 124(3)–e105.

9. Sundström-Poromaa, I. & Comasco, E. 2023. New Pharmacological Approaches to the Management of Premenstrual Dysphoric Disorder. CNS Drugs. 37(5):371–379.