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PeriodsWhat is premenstrual tension, and what helps?
What to know
- Premenstrual tension (PMT), also called premenstrual syndrome (PMS), is a group of physical and emotional symptoms that appear in the one to two weeks before your period. Most people who menstruate experience it to some degree.
- Common symptoms include mood swings, bloating, breast tenderness, fatigue, irritability and food cravings. They usually ease once your period starts.
- Lifestyle changes, particularly regular exercise, balanced eating and good sleep, are the first line of management and help many people. Over-the-counter painkillers can relieve cramps and headaches.
- If symptoms are severe or affecting your daily life, your GP can discuss further options including hormonal contraceptives, antidepressants or talking therapy. A small number of people experience a more severe form called PMDD, which needs specialist support.
Most people who menstruate will recognise the pattern: a few days before your period, your mood dips, your jeans feel tighter, your breasts ache and you find yourself reaching for chocolate at three in the afternoon. That is premenstrual tension, often shortened to PMT, or called premenstrual syndrome (PMS). The Cleveland Clinic estimates that almost half of all people who menstruate experience at least one PMS symptom, and around one in five find symptoms severe enough to disrupt daily life.
PMT is not something you have to put up with. Understanding what causes it and what the evidence says about managing it can make a real difference to how you feel each month.
What premenstrual tension actually is
PMT is a recurring pattern of physical and emotional symptoms that develops in the luteal phase of your menstrual cycle, the one to two weeks between ovulation and the start of your period. Symptoms typically ease within a day or two of your period beginning.
The NHS notes that the exact cause is not fully understood, but it is thought to be linked to changes in hormone levels during the menstrual cycle, particularly fluctuations in oestrogen and progesterone after ovulation. The Cleveland Clinic adds that individual sensitivity to these hormonal shifts varies widely, which is why some people sail through their cycle while others are significantly affected.
PMT is not a sign of weakness or an overreaction. It is a physiological response to normal hormonal changes, and it is extremely common.
Symptoms to recognise
PMT symptoms fall into two broad groups: physical and emotional. Most people experience a combination of both, and the pattern may change from month to month.
Physical symptoms
- Bloating and fluid retention. Clothes may feel tighter, and you may notice puffiness in your hands, feet or face.
- Breast tenderness or swelling. One of the most commonly reported symptoms.
- Headaches or migraines. Some people experience menstrual migraines specifically linked to hormonal changes.
- Cramping or pelvic discomfort. This can begin before your period starts.
- Fatigue and disrupted sleep. Feeling unusually tired, or finding it harder to fall or stay asleep.
- Skin changes. The NHS lists spotty skin and greasy hair among common premenstrual symptoms.
- Digestive changes. Constipation, diarrhoea or a change in appetite, including food cravings.
Emotional symptoms
- Mood swings and irritability. Small things that would not normally bother you may feel overwhelming.
- Feeling anxious, upset or tearful. You may feel low or emotionally fragile without a clear reason.
- Difficulty concentrating. The Cleveland Clinic lists brain fog and concentration problems as common emotional symptoms.
- Reduced confidence or motivation. Tasks that are usually manageable may feel harder than usual.
- Changes in sex drive. This can go in either direction.
The Mayo Clinic notes that emotional triggers such as relationship conflicts, work stress and fatigue can make premenstrual symptoms feel worse, even though they are not the underlying cause.
Why some people are more affected than others
Researchers do not fully understand why PMT affects people so differently. The current thinking, summarised by the Cleveland Clinic, is that it is not simply about hormone levels but about how sensitive your brain is to normal hormonal fluctuations. Two people with identical hormone levels may have very different premenstrual experiences.
Several factors may increase your risk of more severe symptoms:
- A personal or family history of depression or anxiety. Pre-existing mood conditions can be amplified by hormonal shifts.
- High stress levels. Stress does not cause PMT, but it can make symptoms harder to cope with.
- Age. Symptoms tend to be more noticeable in your late twenties and thirties, and can intensify during perimenopause. The Better Health Channel notes that severity often increases during the teenage years and again approaching menopause.
- Lifestyle factors. Smoking, high alcohol intake, poor sleep and a sedentary lifestyle are all associated with more troublesome PMT.
What actually helps
There is no single cure for PMT, but several approaches have good evidence behind them. The NHS recommends starting with lifestyle changes before considering medication, because for many people, they are enough.
Regular exercise
This is one of the most consistently supported recommendations across all the clinical sources. The NHS, the Mayo Clinic and the Cleveland Clinic all advise at least 30 minutes of moderate activity on most days. Exercise helps with mood, sleep, bloating and energy levels. It does not need to be intense: brisk walking, swimming, cycling or yoga all count.
Balanced eating
The Mayo Clinic recommends eating smaller, more frequent meals (every two to three hours) to reduce bloating and stabilise blood sugar. Other dietary strategies with clinical support include:
- Reducing salt in the week before your period to ease fluid retention and bloating.
- Choosing complex carbohydrates (wholegrain bread, oats, brown rice) over refined sugars.
- Increasing calcium-rich foods. Several sources, including the Mayo Clinic, note that calcium may help reduce the severity of PMS symptoms. Dairy products, fortified plant milks and leafy greens are good sources.
- Cutting back on caffeine and alcohol, both of which can worsen mood swings, anxiety and sleep problems.
Sleep and stress management
The NHS advises prioritising sleep in the premenstrual window and using relaxation techniques such as yoga, meditation or breathing exercises to manage stress. Poor sleep and high stress do not cause PMT, but they make symptoms harder to cope with.
Over-the-counter pain relief
The NHS recommends ibuprofen or paracetamol for period pain, headaches and breast tenderness. Ibuprofen is an anti-inflammatory and is generally more effective for menstrual cramps. Always follow the dosage instructions on the packet.
Tracking your symptoms
Keeping a symptom diary for two or three cycles can help you see the pattern clearly and plan around it. The Mayo Clinic recommends noting which symptoms appear, when they start, how severe they are and when they ease. This record is also useful if you decide to see your GP, as it gives them a clearer picture of what you are experiencing.
Track your symptoms for two full cycles using a notebook or a period-tracking app. Note the day of your cycle, your symptoms and their severity (mild, moderate, severe). Patterns often become obvious within a month or two, and knowing when to expect symptoms makes them easier to manage.
Supplements: what the evidence says
Several supplements are commonly recommended for PMT. The evidence varies, and none is a guaranteed fix, but some have reasonable support.
- Calcium. The most studied supplement for PMS. The Mayo Clinic cites evidence that calcium supplementation may reduce both physical and emotional symptoms. A typical dose in studies is 1,000 to 1,200 mg per day.
- Vitamin B6. The NHS lists vitamin B6 among supplements that may help. It is thought to support neurotransmitter production. The recommended dose is no more than 10 mg per day as a regular supplement (higher doses over long periods can cause nerve damage).
- Magnesium. May help with bloating, mood and breast tenderness. The evidence is limited but some clinical sources, including the Better Health Channel, consider it worth trying.
- Agnus castus (chasteberry). A herbal remedy traditionally used for PMT. Some studies suggest it may help with breast tenderness and irritability, but the evidence base is small and the quality is mixed. It may interact with hormonal contraceptives.
The Mayo Clinic and the NHS both caution that herbal supplements are not regulated in the same way as medicines and can interact with other medications. If you are considering a supplement, speak to your GP or pharmacist first, particularly if you are taking hormonal contraception or antidepressants.
Calcium has the strongest evidence base among PMS supplements, followed by vitamin B6 and magnesium. Herbal remedies such as agnus castus, evening primrose oil and St John’s wort have weaker or more mixed evidence. No supplement replaces lifestyle changes as the foundation of PMT management.
Medical treatment
If lifestyle changes and over-the-counter remedies are not enough, your GP has several options to discuss with you.
- Combined oral contraceptive pill. The NHS lists this as a treatment option for PMT. It works by suppressing ovulation, which reduces the hormonal fluctuations that trigger symptoms. Not all pills are equally effective for PMS, so your GP may suggest a specific type.
- Antidepressants (SSRIs). For people whose main symptoms are emotional, particularly low mood, anxiety and irritability, the Mayo Clinic notes that SSRIs such as fluoxetine, sertraline or paroxetine can be effective. Some can be taken only in the luteal phase (the two weeks before your period) rather than every day. Your GP will discuss whether this approach is appropriate for you.
- Cognitive behavioural therapy (CBT). The NHS includes CBT as a treatment option for PMS, particularly for mood-related symptoms. It helps you identify and change unhelpful thought patterns that may be amplifying the emotional impact of hormonal changes.
- Diuretics. In rare cases where fluid retention is severe, a GP may prescribe a short course of a diuretic such as spironolactone.
If first-line treatments do not help, your GP may refer you to a gynaecologist for further assessment. Specialist options can include continuous hormonal treatments or, very rarely, surgical approaches for the most severe cases.
When PMT is more than PMT: PMDD
A small number of people experience a significantly more severe form of premenstrual symptoms called premenstrual dysphoric disorder (PMDD). The Cleveland Clinic estimates that PMDD affects around 3 to 8 per cent of people who menstruate.
PMDD involves the same timing as PMT, but the emotional symptoms are much more intense. They may include severe depression, overwhelming anxiety, feelings of hopelessness, and difficulty functioning at work or in relationships. The NHS notes that some people with PMDD experience suicidal thoughts.
If you are experiencing suicidal thoughts, call 999 or go to A&E. You can also call the Samaritans on 116 123, free, 24 hours a day, 7 days a week. PMDD is a recognised medical condition and effective treatment is available.
PMDD is not something to manage alone. If you suspect your symptoms go beyond typical PMT, speak to your GP. Diagnosis usually involves tracking symptoms over at least two cycles to confirm the pattern. Treatment may include SSRIs, hormonal therapy or specialist referral.
When to see your GP
The NHS advises seeing your GP if:
- Lifestyle changes have not helped and your symptoms are affecting your daily life.
- You are struggling with your mood, anxiety or relationships in the premenstrual window.
- You think you may have PMDD.
- Your symptoms are getting worse over time rather than staying stable.
Bring your symptom diary if you have one. It will help your GP see the pattern and decide on the best next step for you.
Common questions about premenstrual tension
Is PMT the same as PMS?
Yes. Premenstrual tension (PMT) and premenstrual syndrome (PMS) are different names for the same condition. PMT is the term more commonly used in the UK, while PMS is more widely used internationally and in clinical guidelines. Both refer to the physical and emotional symptoms that occur in the one to two weeks before your period.
How long does PMT last each month?
Symptoms typically appear one to two weeks before your period and ease within a day or two of your period starting. The Cleveland Clinic notes that some people experience symptoms for only a few days, while others are affected for the full two weeks of the luteal phase. The pattern tends to be consistent from cycle to cycle.
Can exercise really help with PMT?
Yes. Regular moderate exercise is one of the most consistently recommended strategies for managing PMT symptoms. The NHS, the Mayo Clinic and the Cleveland Clinic all advise at least 30 minutes of moderate activity on most days. Exercise helps with mood, bloating, fatigue and sleep. It does not need to be high-intensity: walking, swimming and yoga are all effective.
What is the difference between PMT and PMDD?
PMT (PMS) involves a range of physical and emotional symptoms that are uncomfortable but manageable for most people. PMDD is a much more severe form that significantly disrupts daily life, relationships and work. PMDD involves intense emotional symptoms such as severe depression, anxiety and feelings of hopelessness. It affects an estimated 3 to 8 per cent of people who menstruate and usually requires medical treatment.
Should I take supplements for PMT?
Calcium has the strongest evidence base and may help reduce both physical and emotional PMS symptoms. Vitamin B6 and magnesium also have some support, though the evidence is more limited. Herbal supplements such as agnus castus have mixed evidence and may interact with other medications. Speak to your GP or pharmacist before starting any supplement, particularly if you are taking hormonal contraception or other medication.
Independent guides to natural remedies and supplements, checked against NHS and EFSA references.