PMS: Symptoms, Causes and What Actually Helps

The short answer: PMS (premenstrual syndrome) is the set of physical and emotional symptoms many women get in the week or two before a period, such as bloating, sore breasts, headaches, irritability and low mood. It's linked to the normal rise and fall of hormones after ovulation, and it usually eases within a few days of bleeding starting. Regular exercise, steady meals, good sleep, stress relief and simple painkillers help most people. If PMS is disrupting your life, or you feel hopeless or unsafe, see a doctor.

What PMS actually is

PMS is not a disease and it isn't "all in your head". It's a pattern of symptoms that turns up in the second half of your cycle, between ovulation and your period, and fades once your period begins. Most women notice at least some PMS at some point in their lives.

For some, it's a day of feeling puffy and snappy. For others, it takes over a whole week every month and affects work, studies and family life. Both are real, and both deserve to be taken seriously.

The key feature is timing. PMS has a clear "on" phase before your period and an "off" phase afterwards. If you feel the same all month, something else is more likely to be going on.

Common PMS symptoms

Symptoms vary from person to person and from month to month. You might have two or three mild ones, or many at once. These are the ones the NHS lists as most common:

Some women also notice puffy fingers or ankles, a few days of constipation or loose motions, or feeling clumsier than usual. Many describe a craving for something sweet or salty, like a packet of chips or a gulab jamun, that feels hard to resist.

How long PMS lasts

PMS symptoms usually start anywhere from a few days to about two weeks before your period. They tend to peak in the last two or three days before bleeding and settle within the first few days of your period. If you have a 28-day cycle and ovulate around day 14, PMS might begin anywhere from day 15 onwards.

Why PMS happens

Doctors don't fully understand the cause, but it's closely tied to hormone changes in your cycle. After ovulation, your ovaries make more progesterone. If you don't get pregnant, both progesterone and oestrogen fall sharply just before your period.

Everyone goes through these shifts, but some people are more sensitive to them. That sensitivity seems to affect brain chemicals such as serotonin, which helps control mood, sleep and appetite. This is why PMS can affect your feelings as much as your body.

Things that can make PMS feel worse

• Stress: exam season, a heavy week at work or tension at home can turn up the volume on symptoms.
• Poor sleep: late nights, shift work or a baby waking you can make irritability and tiredness harder to manage.
• Skipped or irregular meals: long gaps without food can bring on headaches, shakiness and mood dips.
• Lots of salt, sugar and caffeine: these can add to bloating, cravings and jitteriness.
• Smoking and alcohol: both are linked to worse symptoms.

Is it PMS or something else?

Several conditions can feel like PMS, so it helps to be sure. The simplest and most useful tool is a symptom diary. Every day for at least two cycles, note the date, the day of your cycle, your main symptoms and how strong they felt on a scale of 0 to 10. A notebook works, and so does a period-tracking app.

Bring this diary to your doctor. It shows the pattern far more clearly than memory can. If you're not sure how to count your cycle days, our guide on how to calculate your next period date walks you through it.

A worked example

Meera, 27, notes that from about day 20 of her 29-day cycle she feels bloated, her breasts are sore and she snaps at her younger brother over small things. By day 2 of her period she feels like herself again. That on-off pattern, repeated over two months, points strongly to PMS.

Her cousin Ritu feels tired, low and uninterested in things almost every day, with only a small dip before her period. That's not a classic PMS pattern. It could be depression, anaemia, a thyroid problem or something else, and it's worth seeing a doctor.

Conditions that can look like PMS

• Depression or anxiety: these can get worse before a period, which is sometimes called premenstrual exacerbation, but they are present at other times too.
• Thyroid problems: can cause tiredness, mood changes and weight changes throughout the month.
• Anaemia: low haemoglobin, common in India, can cause constant tiredness, breathlessness and headaches.
• Early pregnancy: sore breasts, tiredness and mood changes can happen in both. If your period is late, do a pregnancy test.
• Perimenopause: in your 40s, shifting hormones can bring PMS-like symptoms along with changes to your periods.

When PMS is more than PMS: PMDD

A small number of women have premenstrual dysphoric disorder, or PMDD. It's a severe form of PMS where the emotional symptoms are much more intense and have a big impact on everyday life. It's a recognised medical condition, not a weakness, and it can be treated.

PMDD symptoms follow the same timing as PMS, but they can include:

• Strong feelings of anger, anxiety or depression that feel out of proportion
• Feeling hopeless, worthless or unable to cope
• Arguments and strain in relationships that happen mostly in the same week each month
• Overeating, sleeping much more or much less, and joint or muscle pain
• Thoughts of self-harm or suicide

The cause isn't clear, but it's thought to involve extra sensitivity to normal hormone changes, and it may run in families. If your diary shows severe symptoms that lift soon after your period starts, tell your doctor clearly that you think it might be PMDD.

If you feel unsafe

If you ever have thoughts of harming yourself, please reach out straight away. In India, you can call Tele-MANAS, the government's free mental health helpline, on 14416. If you are in immediate danger, call 112 or go to the nearest hospital emergency department, and ask someone you trust to go with you.

What actually helps with PMS

For most women, a handful of everyday changes make a real difference. Give them two or three cycles before you judge, because PMS varies month to month.

Move your body

Regular exercise is one of the most useful things you can do. A brisk 30-minute walk, yoga, cycling, swimming or dancing in your room all count. Activity can lift mood, ease cramps and help you sleep. It doesn't need to be intense, and the habit across the whole month matters more than a single workout.

Eat little and often

The NHS suggests smaller, more frequent meals, every two to three hours, to keep energy and mood steady. Build meals around whole grains, dal, vegetables, fruit and some protein. Think a bowl of poha with peanuts and vegetables, ragi dosa with sambar, curd with fruit, or roti with palak dal.

In the week before your period, go easy on very salty snacks, pickles, sweets and lots of chai or coffee. These can make bloating, cravings and irritability worse. You don't have to cut them out entirely. Just keep portions modest.

Protect your sleep

Aim for the same bedtime and wake-up time every day, including weekends. Put your phone away half an hour before bed. If you share a room in a joint family, earplugs or an eye mask can help more than you'd expect.

Bring your stress down

Slow breathing, meditation, prayer, a short walk alone or ten quiet minutes with music can all help. If you know which days are hardest, try to keep them lighter. Move a difficult meeting if you can, or tell your family that you need a bit of space.

Use simple pain relief

For headaches, cramps and breast pain, painkillers such as paracetamol or ibuprofen can help. Ibuprofen isn't suitable for everyone, for example if you have a stomach ulcer or some types of asthma. Check the packet or ask a pharmacist what's right for you.

Cut down on smoking and alcohol

Both are linked to worse PMS. Stopping smoking also has huge benefits for your long-term health.

What about supplements?

You'll see vitamin B6, calcium, vitamin D and magnesium recommended online for PMS. The NHS says the evidence for these is limited. Talk to a doctor or pharmacist before taking any, especially if you take other medicines. A balanced diet with dairy, ragi, green leafy vegetables, nuts and seeds covers many of the same nutrients.

Staying comfortable in the days before your period

Small comforts matter when you feel bloated and tender. Loose cotton clothes, a soft bra without underwire and a hot water bottle on your tummy can ease a lot of the physical discomfort.

Many women find tight waistbands unbearable on bloated days. A soft high waist period panty sits gently over your tummy, and because PMS often means you're not sure exactly when your period will arrive, its built-in absorbent layers keep you covered if bleeding starts early. On lighter spotting days, a panty liner is enough.

If your period does tend to come with very heavy flow or large clots, read our guide to how much bleeding is too much, as that's worth checking separately.

What a doctor can offer

If self-help hasn't made enough difference after two or three cycles, a doctor can help. In India, you can start with your family doctor, a gynaecologist, or a doctor at your local government health centre.

They'll ask about your symptoms and your diary, your periods, any medicines you take and your mental health. They may check your blood pressure, and sometimes order blood tests to rule out anaemia or thyroid problems.

Depending on your symptoms, your doctor may suggest:

• Hormonal treatment: such as the combined contraceptive pill, which smooths out the hormone ups and downs of your cycle.
• Talking therapy: cognitive behavioural therapy (CBT), a practical type of counselling that helps you change unhelpful thought patterns and cope with symptoms.
• Antidepressants: certain antidepressants can help when mood symptoms are severe, including in PMDD.
• Referral: to a gynaecologist, psychiatrist or counsellor if symptoms continue despite treatment.

Common myths about PMS

• "It's just an excuse for bad behaviour." PMS has a clear biological basis. Recognising it helps you plan, and it helps families respond with understanding instead of blame.
• "You just have to live with it." Most women can reduce their symptoms with lifestyle changes, and effective medical treatment exists for those who need more.
• "Severe mood symptoms before a period are normal." Feeling hopeless, very angry or unsafe is not something to put up with. That may be PMDD, and help is available.

See a doctor if

• PMS is affecting your daily life, work, studies or relationships
• Lifestyle changes haven't helped after two or three cycles
• Your symptoms carry on throughout the month, not just before your period
• You think you might have PMDD
• You also have very painful, very heavy or irregular periods
• Your period is late and you might be pregnant

Get urgent help if

• You have thoughts of suicide or self-harm, or feel you can't keep yourself safe: call Tele-MANAS on 14416, call 112, or go to the nearest hospital emergency department

Frequently asked questions

How many days before a period does PMS start? Usually anywhere from a few days to about two weeks before, after ovulation. Symptoms tend to be strongest in the last few days before bleeding and ease within a few days of your period starting.

Can PMS feel like early pregnancy? Yes. Sore breasts, tiredness, bloating and mood changes can happen in both. If your period is late, take a home pregnancy test. Our guide on why a period can be late when you're not pregnant covers other reasons too.

Does PMS get worse with age? It can change over time. Many women notice stronger symptoms in their late 30s and 40s as they approach perimenopause, when hormone levels become less predictable.

Can teenagers get PMS? Yes, PMS can start any time after periods begin. Teens may notice mood swings, spots and tiredness before a period. The same self-help steps work, and a parent or school counsellor can help if it's affecting school.

Can food really help PMS? Regular, balanced meals help keep energy and mood steady. Cutting back on salt, sugar and caffeine before your period can reduce bloating and irritability. No single food is a cure.

What is the difference between PMS and PMDD? PMDD is a much more severe form of PMS. The emotional symptoms, such as anger, anxiety, depression or hopelessness, are intense enough to seriously disrupt daily life. It needs proper medical help.

Related reading

• Is My Period Pain Normal? How to Tell, and What Helps
• Irregular Periods: Causes, Tests and What Helps
• Perimenopause: Symptoms, Period Changes and What Helps
• Discharge Before Your Period or Early Pregnancy? How to Tell the Difference

This article is for general information and doesn't replace advice from your doctor.

Sources: NHS: PMS (premenstrual syndrome), NHS: Period pain