At a glance
- PMT and PMS describe the same symptoms. PMT is the older, mostly UK name for premenstrual tension.
- PMDD is a separate, more severe diagnosis with its own DSM-5-TR and ICD-11 criteria. It has its own symptom and timing requirements, distinct from PMT.
- Whichever word is used, the common thread is a hormone drop in the luteal phase, after ovulation.
- If symptoms ease once your period starts, PMT or PMS fits. If they disrupt a week of your life and include a mood symptom, ask about PMDD.
What is PMT (premenstrual tension)?
PMT stands for premenstrual tension. It's an older, informal name for the physical and emotional changes that can show up in the one to two weeks before a period.
You'll still see PMT used in:
- Some UK clinics
- Patient leaflets
- Older medical texts
It's treated there as another word for PMS. The "tension" part points to the irritability, tightness or unease a lot of women describe. Common physical signs include:
- Bloating
- Breast tenderness
- Headaches
- Fatigue or trouble sleeping
PMT is a descriptive label for premenstrual symptoms, the same way PMS is in everyday speech, not a formal diagnosis in DSM-5-TR or ICD-11 with its own criteria. Menstrual cycle hormones, phase by phase walks through why these shifts happen at all.
How does PMT relate to PMS and PMDD?
Current research and guidelines mostly skip the word "PMT" and use PMS or PMDD instead. ACOG, the DSM-5-TR and ICD-11 all define premenstrual symptoms using those two terms, so PMT has become more of a historical or regional label than a clinical one.
| Term | What it means | How it's used today |
|---|---|---|
| PMT | Older name for premenstrual symptoms, with an emphasis on tension or irritability | Mostly UK, informal, interchangeable with PMS |
| PMS | Physical or emotional symptoms in the 1 to 2 weeks before a period, easing once it starts | The common term in most clinics and research |
| PMDD | A DSM-5-TR and ICD-11 diagnosis: at least five symptoms, one a mood symptom, confirmed by daily tracking over two cycles | A distinct, more severe diagnosis with its own criteria |
If what you're calling PMT eases within a few days of your period starting, PMS is probably the better word for it. If it disrupts a week of your life every month and includes a mood symptom like rage, hopelessness or anxiety, PMDD might fit better.
Why does it matter for treatment and coping?
The word you use doesn't change what's happening in your body. Estrogen and progesterone drop in the luteal phase, and that drop affects mood and energy either way. What changes is what helps.
For PMT or PMS-level symptoms, coping tools, movement and tracking your cycle are often enough. For PMDD, guidelines point to options a doctor manages: SSRIs (sometimes taken only in the luteal phase), certain hormonal contraceptives, or CBT.
Niyora is a PMS and PMDD support app. If you want somewhere to put a hard moment before you react to it, Niyora's Moon lets you write what happened, see it from another angle and draft a reply you can hold onto for 20 minutes.
Naming the pattern correctly decides whether you reach for a coping tool tonight or bring two months of daily notes to a doctor.
What related terms should you know?
A few terms show up alongside PMT once you start reading more.
- PMDD: the clinical diagnosis for the most severe premenstrual pattern.
- Luteal phase: the back half of your cycle, after ovulation, when PMT or PMS symptoms build.
- Corpus luteum: the structure that forms after ovulation and whose breakdown around day 24 triggers the hormone drop behind these symptoms.
- Allopregnanolone: a hormone byproduct some brains react to differently, part of why PMDD exists.
For a wider look at what's actually been studied, PMS and PMDD research, summarised rounds up the evidence behind these terms.
Questions people ask
Is PMT the same as PMS?+
PMT (premenstrual tension) and PMS describe the same symptoms: physical and emotional changes in the week or two before a period. PMT is just the older name, still common in some UK clinics, while PMS is the term used almost everywhere else today.
Is PMT a medical diagnosis?+
PMT isn't a formal diagnosis in DSM-5-TR or ICD-11. It's a descriptive label for premenstrual symptoms, the same way PMS is, not a specific set of criteria a doctor checks against. PMDD, by contrast, is a confirmed diagnosis.
Does having PMT mean I have PMDD?+
PMT usually describes milder symptoms that ease once your period starts, which fits PMS. PMDD is a separate, more severe pattern: at least five symptoms, including one mood symptom, confirmed by daily tracking over two cycles. PMT alone doesn't mean PMDD.
Why do some clinics still use the term PMT?+
Some UK clinics and older patient leaflets kept "PMT" from earlier medical writing, when it was the common shorthand for premenstrual symptoms. Clinically, it means the same thing as PMS, so you can read PMT and PMS interchangeably in most material.
What causes PMT symptoms?+
PMT symptoms, like PMS and PMDD, are tied to the drop in estrogen and progesterone after ovulation, in the luteal phase. Some brains react more strongly to that normal hormone shift, which is part of why symptoms vary so much between people.