Tired and worn out during your period. What can I do?

Feeling tired and worn out during your period is common, and you are not imagining it. In a 2026 survey of 336 people in Germany and Austria, distress from symptoms was higher during menstruation than at other times of the cycle, and Thai studies of students and nurses found that 70% to 84% had pain during their periods, often enough to affect concentration and daily activities. Symptoms alone cannot show whether your body is short of anything, or what: if tiredness goes on, a doctor can ask about it and, if needed, arrange tests. Day to day, protect your sleep, eat regular meals from all the food groups and keep moving gently, and see a doctor if your periods affect your daily life, have changed, or the tiredness goes on after your period ends.

This article is about tiredness that comes with periods. For the many other everyday reasons people feel drained, see Tired, drained and sleepy all day: what causes it?

Is it normal to feel tired and drained during a period?

What many women notice

Volpi and König at the University of Vienna asked 336 people in Germany and Austria how often 25 symptoms occurred at different points in the cycle and how much they bothered them. Distress from symptoms was modest overall, but it was higher during menstruation than at the other times of the cycle. Pain, together with discomfort, went with more disruption to daily life during the period and the days before it. The study was online and relied on what people reported, so the authors advise caution.

The days before a period can feel different too. The NHS describes symptoms that some women have in the weeks before their period, including mood swings, feeling irritable or emotional, tiredness or trouble sleeping, bloating, breast tenderness, headaches and changes in appetite. These vary from woman to woman and from month to month.

What Thai studies have found

Thai research has mostly asked about pain during periods and how it affects study and work. The studies below did not measure tiredness directly, but they show how common it is to feel unwell during a period:

These studies come from particular universities and hospitals and rely on questionnaires, so the figures may differ elsewhere. They were also done among students and nurses, groups with long days and irregular rest, which may not match everyone.

Why might I feel so worn out during my period?

There is rarely one single reason. Studies have seen several things that tend to go together with feeling worse during a period. These are links, not proof that one thing causes another.

Pain and discomfort

In the Siriraj nurses study, 81% of those with moderate or severe pain said it affected their concentration, and 16.5% had missed work. In the Nakhon Pathom students, more than 60% of those with pain said it affected their concentration in class. Getting through a day of study or work with cramps or backache takes effort, and that adds to the day's tiredness.

Sleep and rest

The NHS lists not getting enough sleep, stress and hormonal changes among the common reasons people feel tired. The review of Southeast Asian medical students by Ky and colleagues reported caffeine intake, limited rest and low or irregular physical activity as possible correlates of period problems. The studies in that review differed a great deal from each other, so the authors describe the findings as exploratory.

Everything else that is going on

A period does not happen in isolation. Exams, shift work, a busy month at work or a child who is waking at night all add up. If you feel drained for most of the month, not only during your period, the cause may lie elsewhere. See Tired, drained and sleepy all day: what causes it? for the everyday causes.

If I'm tired during my period, is my body short of something?

Symptoms alone cannot tell you

Tiredness is a symptom with many possible causes, and the same feeling can come from short sleep, pain, stress or something unrelated to periods. Whether your body is short of anything, and what, cannot be worked out from how tired you feel.

A doctor can check

The NHS says that if you have felt tired for a while and the cause is not clear, a doctor may arrange tests, such as blood tests. So the reliable way to find out is to see a doctor, describe your periods and your tiredness, and let them decide which tests, if any, you need.

What to note before your appointment

• When each period starts and ends, for 2 or 3 cycles
• How tired you feel on each day, and whether it continues after your period
• How many hours you sleep, and whether pain wakes you
• Any medicines or health products you use

The NHS suggests keeping a diary of symptoms for at least 2 cycles (on its page about symptoms before a period). It also helps the doctor see whether your tiredness follows your cycle or not.

How can I look after myself day to day?

Sleep and rest

The US CDC recommends 7 or more hours of sleep a night for adults aged 18 to 60. On its page about tiredness, the NHS suggests sticking to the same sleep times, relaxing for a couple of hours before bed, and not having caffeine in the couple of hours before sleep. On days when you feel worn out, a lighter evening and an earlier night may help you keep to this.

Regular meals from all the food groups

The NHS lists a healthy diet and regular exercise among things you can do when you feel tired. For everyday Thai meals, Ramathibodi Hospital's @Rama magazine explains the 2:1:1 healthy plate, recommended by the Thai Health Promotion Foundation (ThaiHealth):

When you have little energy to cook, a plate from a food stall with rice, a protein food and vegetables is closer to this than a bag of fried snacks.

Gentle movement

On days when you feel drained, a short walk, stretching or light housework may feel better than lying still all day, but listen to your body and rest when you need to.

Help with the load

If your period days are hard, plan around them where you can: move a heavy task to another day, share childcare or housework, and tell a manager or teacher you trust if pain regularly affects your work or study.

If you use any medicine for period pain, or any other health product, ask a pharmacist or doctor which is suitable for you.

When should I see a doctor?

How heavy is your bleeding?

The NHS explains that a period usually lasts about 5 days, anywhere between 2 and 7 days, and that most people lose about 20 to 90 ml of blood, about 1 to 5 tablespoons, though some bleed more. Its page on heavy periods says you may have heavy periods if you need to change a pad or tampon every 1 to 2 hours, need to use two types of period product together, have periods lasting more than 7 days, pass blood clots larger than about 2.5 cm (roughly the size of a 10-baht coin), bleed through to your clothes or bedding, avoid daily activities or take time off work because of your periods, or feel tired or short of breath a lot. The NHS adds that many women have heavy periods and that they may be normal for you.

Book an appointment if

The NHS advises seeing a doctor if:

• heavy periods are affecting your life, or you have had heavy periods for some time
• you have severe pain during your periods
• you bleed between periods or after sex
• your periods change
• you have felt tired for a few weeks and are not sure why, or tiredness affects your daily life
• symptoms in the weeks before your period affect your daily life

If you feel very unwell

If you feel very unwell and think it is an emergency, call 1669, Thailand's emergency medical number, or go to the nearest hospital. If you feel low or overwhelmed, you can call the 1323 mental health hotline, free and open 24 hours a day.