Quick answer
What is period pain?
Period pain (dysmenorrhoea) is cramping pain in the lower tummy during menstruation, caused by the womb contracting to shed its lining. Mild to moderate pain is common and usually eased by heat, exercise and painkillers. See a GP if pain is severe, suddenly worse than usual, or stops you living normally each month.
Period pain is common
Most women and girls experience period pain (medically called dysmenorrhoea) at some point — cramping or aching in the lower tummy, back or thighs around the time of menstruation. For many people it is mild and manageable; for others it is severe enough to disrupt daily life. Both experiences are worth taking seriously.
What causes period pain
Each month the womb lining thickens, then sheds during a period. The womb contracts to help this process — triggered by natural chemicals called prostaglandins. These contractions briefly reduce blood flow to the womb muscle, causing pain.
Primary dysmenorrhoea — pain without an underlying condition — is most common in teenagers and women in their 20s and 30s.
Secondary dysmenorrhoea — pain caused by another condition — often starts later and may worsen over time. Causes include endometriosis, fibroids, and pelvic inflammatory disease.
What normal pain feels like
Typical period pain:
- cramping or dull ache in the lower tummy
- may spread to the back and thighs
- starts when bleeding begins or just before
- lasts one to three days
- improves with painkillers and heat
Pain varies month to month — stress, weight and age can all affect it.
Easing period pain at home
Evidence-based self-help includes:
- Heat — a hot water bottle or heat pad on the lower abdomen
- Ibuprofen or naproxen — anti-inflammatory painkillers often work better than paracetamol for period cramps; take with food and start at the first sign of pain
- Paracetamol — if anti-inflammatories are not suitable for you
- Gentle exercise — walking, swimming or yoga may reduce pain over time
- Rest — especially during the heaviest pain days
Transcutaneous electrical nerve stimulation (TENS) machines help some people.
When pain suggests something more
See a GP if you have:
- pain so severe it regularly stops you working or studying
- pain that is getting worse year on year
- pain during sex or when opening bowels
- very heavy periods
- difficulty getting pregnant
- pain that does not respond to painkillers
These patterns may indicate endometriosis (tissue similar to womb lining growing elsewhere), fibroids (non-cancerous growths in the womb), or other treatable conditions. Early diagnosis improves outcomes.
Medical treatments
A GP may offer:
- stronger anti-inflammatory painkillers
- the contraceptive pill or other hormonal contraception to lighten periods and reduce pain
- investigation — ultrasound, referral to gynaecology
- treatment for endometriosis or fibroids if found
You should not have to accept severe monthly pain as “just part of being a woman.”
Period pain and fertility
Most people with primary period pain have normal fertility. Endometriosis can affect fertility — another reason to investigate severe pain, especially if planning a pregnancy.
Supporting teenagers
Painful periods are a common reason girls miss school. Heat, timely painkillers, and GP assessment for severe cases all help. Do not normalise pain that prevents normal activities.
Common questions
- What causes period pain?
- Chemicals called prostaglandins trigger the womb muscle to contract, temporarily reducing blood flow and causing cramping pain. Higher prostaglandin levels mean more pain. Pain without an underlying condition is called primary dysmenorrhoea.
- What helps period pain at home?
- A heat pad or hot water bottle on the lower tummy, ibuprofen or naproxen (anti-inflammatories work particularly well — check suitability), gentle exercise, and rest. Start painkillers at the first sign of pain for best effect.
- When is period pain a sign of something else?
- Secondary dysmenorrhoea — pain from an underlying condition — may worsen over time, occur outside periods, or come with heavy bleeding and pain during sex. Endometriosis and fibroids are common causes worth investigating.
- Can the contraceptive pill help period pain?
- Yes. Combined and progestogen-only contraceptives often reduce period pain and bleeding by thinning the womb lining. A GP can discuss options if pain is a recurring problem.
- Is it normal for teenagers to have painful periods?
- Some cramping is normal from early periods onwards and often improves with age. However, severe pain in teenagers should not be dismissed — endometriosis can start in adolescence and early treatment helps.