Period cramps: relief, PMS and when pain isn't normal

In short

• Period pain that stops you from doing your daily activities is worth getting checked, not just enduring.
• Heat, gentle exercise and anti-inflammatory medicines used as directed are the usual first steps.
• PMS is a set of symptoms that appears before a period and eases once bleeding starts; PMDD is a severe form.
• Pain that is getting worse, pain during sex or between periods can signal endometriosis or another condition.
• Hormonal contraception can ease pain for some people, and a doctor can help you choose.

Why periods hurt

Period pain is pain or discomfort before or during your period. It usually starts around the beginning of the period and often lasts up to 3 days. It can be a sharp pain or a dull ache in the lower belly, and cramps can spread to the back and thighs.

Often there is no underlying condition: the womb tightens during your period, which is a normal part of the menstrual cycle. In other cases a condition causes the pain, and that matters because it needs its own treatment.

When a condition is behind the pain

• Endometriosis and adenomyosis, where womb-like tissue grows in other places.
• Fibroids, which are growths in and around the womb.
• Pelvic inflammatory disease, an infection of the womb, fallopian tubes and ovaries.
• An intrauterine device (IUD), which can cause pain, especially in the first 3 to 6 months after it is fitted.

Endometriosis is common: WHO estimates that about 10 percent of reproductive-age women worldwide have it. Its most common symptom is severe pain during menstruation. Other signs include heavy bleeding, pelvic pain that continues after the period ends, bloating and nausea, trouble getting pregnant, and effects on sex, bowel movements and urination.

Because symptoms vary so much, the average time to a diagnosis is 4 to 12 years. That is why pain should be taken seriously rather than dismissed as normal.

What helps with period cramps

1. Use heat.A warm bath or shower, or a heat pad or hot water bottle wrapped in a tea towel, can ease the ache.
2. Try gentle movement.Yoga, swimming, walking or cycling may help, and so can massaging the belly and back.
3. Take pain relievers as directed.Ibuprofen and similar anti-inflammatory medicines can ease pain. Follow the label or your doctor's advice, and check with your provider if you have stomach, kidney or heart problems or take blood thinners.
4. Ask about a TENS machine.A small device that sends mild electrical impulses can reduce pain for some people.
5. Look after habits.Cutting down on alcohol and not smoking may also help.

PMS and PMDD

Premenstrual syndrome is a group of physical and emotional symptoms that start one to two weeks before a period and usually ease once bleeding begins. Severity ranges from mild to severe. The exact cause is unknown, but changing hormone levels during the cycle probably play a role.

• Physical: breast swelling and tenderness, acne, bloating and weight gain, headache, joint and back pain, constipation or diarrhea, food cravings.
• Emotional: irritability, mood swings, crying spells, low mood, anxiety, sleep changes, trouble concentrating.
• PMDD: a severe form of PMS in which symptoms interfere with daily life; it is much less common than PMS.

There is no single test. Providers look at your symptoms, when they occur and how much they affect you. For a PMS diagnosis, symptoms should occur in the five days before a period for three cycles in a row, end within four days after it starts, and prevent some normal activities. Tracking your symptoms helps you describe the pattern.

What helps with PMS

• Regular exercise and enough sleep.
• Healthy eating, and cutting back on salt, caffeine, sugar and alcohol in the two weeks before your period.
• Over-the-counter pain relievers for cramps, headaches, backaches and breast tenderness.
• Calcium and vitamin B6, which some studies suggest may help certain symptoms. Evidence for herbal supplements is insufficient, so check with a provider before taking any supplement.

If self-care is not enough, prescription options include hormonal birth control, which can ease physical symptoms but sometimes worsens emotional ones, and antidepressants such as SSRIs for emotional symptoms. Diuretics and anti-anxiety medicines are sometimes used too, always as prescribed by a doctor.

When to see a doctor

See your primary care provider if periods become more painful, heavier or irregular, if pain stops you doing daily activities, if you have pain during sex or when urinating or passing stools, if you bleed between periods, or if you have a swollen belly, loss of appetite or unexplained weight loss. If pain is severe or worse than usual and pain relievers have not helped, get urgent medical advice.

Red flags, call 911: fainting or severe weakness, very heavy bleeding, sudden severe pain on one side of the lower abdomen, or pain with a high temperature and foul-smelling discharge.

How a doctor finds the cause

A clinician usually starts with your medical history and a physical exam. Tests such as an ultrasound scan may be arranged to find the cause, and you may be referred to a gynecologist if pain does not improve or a condition such as fibroids is suspected.

Blood tests can be used to look for other conditions that cause similar symptoms. For endometriosis, surgery is the most definitive test, though it is not available to everyone.

Treatment options

Hormonal contraception, whether the pill, implant or injection, thins the womb lining so that periods are lighter and less painful. Fibroids may be treated with medicine to shrink them or with surgery, and pelvic inflammatory disease usually needs antibiotics.

There is no known permanent fix for endometriosis, but treatment aims to manage symptoms using pain relievers, hormonal medicines, surgery in some cases, and fertility treatment when pregnancy is difficult. Physiotherapy and cognitive behavioral therapy can also help with pain and quality of life.

Questions and answers

Sources

1. NHS — Period pain
2. MedlinePlus — Premenstrual Syndrome
3. WHO — Endometriosis fact sheet
4. NICHD — Menstruation and Menstrual Problems

Sources checked on 29 October 2026.