Period Pain and Menstrual Cycle Health
Period pain and menstrual cramps: what causes them, what eases them, what exercise and supplement reviews found, and which signs mean it is time to see a clinician.
Content last updated . This page has not been medically reviewed.
What period pain is
Period pain, also called menstrual cramps or dysmenorrhea, happens when the uterus tightens during a period. The NHS says it is often a normal part of the menstrual cycle. [1] It usually starts around the beginning of the period and lasts up to 3 days. [1] Cramps may spread from the belly to the back and thighs. [1]Sometimes painful periods have a separate cause, such as endometriosis, adenomyosis, fibroids or pelvic inflammatory disease. [1] An intrauterine device (IUD) can also cause period pain, especially in the first 3 to 6 months after it is put in. [1] See endometriosis and fibroids.
What can ease it
The NHS lists these self-care steps: a warm bath or shower, a heat pad on the belly, massage, gentle exercise such as yoga, swimming, walking or cycling, and over-the-counter pain relievers such as ibuprofen. It also notes that cutting down on alcohol and not smoking may help. [1]If pain is severe, a clinician may suggest prescription anti-inflammatory medicines, a TENS machine (a small device that sends mild electrical pulses), or hormonal contraception to thin the uterine lining. [1]
What research shows
Evidence labels: established recommendation, promising but limited, mixed, insufficient evidence.| Approach | What the source found | Strength of evidence |
|---|---|---|
| Regular exercise | A Cochrane review of 12 trials (854 women) found exercise may have a large effect on reducing menstrual pain compared with no exercise. [2] Studies used about 45 to 60 minutes, three times a week or more. [2] | Promising but limited (low-quality evidence) |
| Dietary supplements and herbs | A Cochrane review of 27 trials found all evidence low or very low quality, no evidence of benefit for vitamin E, and only very limited evidence for some herbs such as ginger and fenugreek. [3] | Insufficient evidence |
| Heat, massage, over-the-counter pain relievers | Listed by the NHS as first steps. [1] | Established practice |
The supplement review included mostly students in their late teens or early twenties, and most trials were in Iran and other middle-income countries, so results may not apply to everyone. [3]
Frequently asked questions
Is period pain normal?
Mild to moderate cramps are common and often part of the cycle, but pain that disrupts daily life is worth checking. [1]
Does exercise help period pain?
A Cochrane review found low-quality evidence that regular exercise may reduce menstrual pain. [2]
Do natural remedies work for cramps?
A Cochrane review found low or very low quality evidence, with no benefit for vitamin E and limited evidence for a few herbs. [3]
Can an IUD cause cramps?
Yes. The NHS says an IUD can cause period pain, especially in the first 3 to 6 months. [1]
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Safety notes
- Pain relievers: follow the label and ask a pharmacist if you take other medicines or have a stomach, kidney or bleeding condition.
- Herbs and supplements: they can interact with medicines. See medication interactions. Do not use them if you could be pregnant without asking a clinician. See pregnancy and breastfeeding safety.
- For ginger as a food or tea, see ginger. The supplement review is not a reason to treat any herb as proven for cramps.
When to get help
References
- NHS. Period pain. Read 2026-10-22.
- Armour M, et al. Exercise for dysmenorrhoea. Cochrane Database Syst Rev. 2019. PubMed. Read 2026-10-22.
- Pattanittum P, et al. Dietary supplements for dysmenorrhoea. Cochrane Database Syst Rev. 2016. PubMed. Read 2026-10-22.
- NHS. Pelvic pain. Read 2026-10-22.