Period back pain is usually referred cramp pain from prostaglandin-driven contractions. Heat, early NSAIDs, and movement work. Pain persisting between periods or worsening over cycles needs evaluation for endometriosis or fibroids.
What to do
Common questions
Why do I get back pain during my period?
Lower back pain with your period is usually the same mechanism as cramps, felt one body part over. The uterus contracts to shed its lining, driven by hormone-like chemicals called prostaglandins, and the pain signal refers into the lower back - the nerves overlap. MedlinePlus notes menstrual pain commonly radiates to the lower back and thighs, and higher prostaglandin levels mean stronger contractions and more pain. Back pain that starts with your period and ends with it, cycle after cycle, fits this benign pattern. What works: heat on the lower back - as effective as painkillers in studies; NSAIDs like ibuprofen started at the first sign, since they block prostaglandin production rather than just masking pain; gentle movement and stretching, which beats bed rest; and the usual cramp helpers - no smoking, decent sleep. Hormonal birth control often reduces both cramps and the back pain that comes with them. The pattern to escalate: back and pelvic pain that persists between periods, gets steadily worse cycle over cycle, comes with very heavy bleeding or pain with sex, or started after years of painless periods - that raises endometriosis, fibroids, or other pelvic conditions, and it deserves a real evaluation, not more ibuprofen. Pymander is a free AI doctor, 24/7 by text. Describe your cycle pattern, and it can help you tell typical from worth-checking.