Cramping pain in the lower belly around a period is very common, and it happens because the muscle of the uterus (womb) tightens to help the lining come away. Several ordinary things genuinely help, and there is also a clear line where pain stops being something to put up with. This page is health information for learning, and a doctor or a trusted adult can help with anything that worries you.

What it usually feels like

The pain is often a cramping ache low in the belly that comes in waves. It can spread to the lower back or the tops of the legs. It usually starts as the bleeding starts, or just before, and is worst in the first day or two [NHS].

Some people also feel sick, have looser poo, get a headache, or feel very tired at the same time. All of that can be part of the same picture.

Pain that comes and goes and that you can carry on around is the usual pattern. Pain you cannot carry on around is not, and that difference is the whole point of this page.

Things that help

• Heat. A heat pack, a hot water bottle over your clothes, or a warm bath. This is one of the most reliably useful things and costs almost nothing [NHS].
• Moving. Walking, stretching, swimming or any gentle exercise. It feels like the last thing you want to do and often helps anyway [NHS].
• Rest and sleep. Being tired makes pain feel worse.
• A hand or a cushion pressed on the sore spot, or curling up on your side.
• Pain relief from a pharmacy. A pharmacist or a doctor can advise which kind suits you and how to take it safely. Ask them rather than copying what a friend takes, and tell them your age and anything else you take.

Nothing on this list is a cure and none of it is guaranteed. Trying two or three of them together usually works better than one.

What does not help, whatever you have been told

Skipping meals, "sweating it out" beyond what is comfortable, or waiting until the pain is unbearable before doing anything. Pain is easier to settle early than late.

Missing school repeatedly and saying nothing does not help either. It is very common, and it is exactly the situation that gets better once an adult knows.

The line

Period pain is common. Period pain that stops your life is common too — and being common is not the same as being something you have to accept.

If pain regularly keeps you off school, stops you sleeping, keeps you from sport or from seeing friends, or does not settle with the things above, that is worth an appointment [ACOG]. There are options a doctor can discuss with you, and getting there sooner is better than putting up with it for years.

A doctor will ask when the pain comes, how long it lasts, what it stops you doing, and what you have already tried. Writing that down for a week or two before you go makes the appointment much more useful — is my period normal explains what is worth noting.

When to see a doctor

You or a trusted adult can arrange an appointment if:

• pain stops you going to school, sleeping, or doing your usual things
• pain does not settle with heat, movement and pain relief from a pharmacy
• the pain is getting worse over months rather than staying the same
• you also bleed very heavily, or for longer than about 7 days
• you have pain at other times of the month, not only with your period
• you have pain when you use a tampon, or during sex

Adults sometimes say period pain is just part of it. It is fair to ask again, or to ask someone else. Period pain and how it is looked at in adults is written for adult readers and goes into more detail if you want it.

Seek care now: get help the same day if the pain is sudden and severe rather than the usual cramping, if you cannot stand up or function at all, if you faint or nearly faint, if you have a fever with the pain, or if you are soaking through a pad or tampon every hour or two.

If it is hard to bring this up at home, there are adults outside home whose job this is, and a school nurse is a good place to start. If you are missing lessons, a period at school covers what to ask for.