Dysmenorrhoea — painful menstruation — affects up to 80% of women at some point, with severe pain limiting daily activities in approximately 20%. Despite its prevalence, it is frequently undertreated and dismissed. Effective management exists and extends well beyond “just take some ibuprofen.”
Why Period Pain Happens
During menstruation, prostaglandins (particularly PGE2 and PGF2α) released from the endometrium trigger uterine muscle contractions that expel the endometrial lining. In women with dysmenorrhoea, prostaglandin levels are significantly higher, producing stronger and more prolonged uterine contractions, which reduce uterine blood flow (ischaemia) and activate pain receptors. In primary dysmenorrhoea (no underlying pelvic pathology), this is the complete mechanism. In secondary dysmenorrhoea, an underlying condition — endometriosis, adenomyosis, fibroids, endometrial polyps, or PID — drives additional inflammation and pain. New-onset severe period pain in women over 25, or pain worsening over time, warrants gynaecological assessment to exclude secondary causes.
NSAIDs: First-Line and Most Effective
Ibuprofen (400mg three times daily) or naproxen sodium (550mg loading dose, then 275mg every 6 hours) are first-line because they directly reduce prostaglandin synthesis — addressing the root cause, not just masking pain. Critical timing: starting NSAIDs 1–2 days before expected menstruation onset (if cycle is predictable) or at the very first sign of bleeding reduces peak prostaglandin levels before significant pain develops. Starting after pain is fully established is substantially less effective. Regular dosing throughout days 1–2 (not only when pain is severe) maintains prostaglandin suppression. COX-2 selective NSAIDs (celecoxib, etoricoxib — prescription) have equivalent efficacy with lower GI effects for those who can’t tolerate standard NSAIDs.
Heat Therapy
Continuous low-level heat applied to the lower abdomen (heat patches, heat pad) is as effective as ibuprofen for period pain according to multiple RCTs — and combining heat with ibuprofen is significantly more effective than either alone. Heat reduces prostaglandin-driven muscle tension through vasodilation and receptor modulation. Reusable heat patches (ThermaCare HeatWraps) provide 8–12 hours of heat and can be worn discreetly.
Other Evidence-Based Approaches
Hormonal contraception: combined oral contraceptive pill, hormonal IUS (Mirena), hormonal implant all reduce prostaglandin production and significantly reduce or eliminate dysmenorrhoea. Omega-3 supplementation: competes with arachidonic acid for COX enzyme access, reducing prostaglandin synthesis. Multiple RCTs show omega-3 (1.5–3g EPA+DHA daily) reduces period pain severity, with onset of benefit after 2–3 months of supplementation. Magnesium: smooth muscle relaxant; evidence for modest reduction in pain and cramping. 250–400mg daily, or starting 3 days before menstruation. Vitamin D: multiple small RCTs show reducing Vitamin D deficiency reduces period pain severity and analgesic use. TENS (transcutaneous electrical nerve stimulation): high-frequency TENS has evidence for period pain relief.
Frequently Asked Questions About Period Pain
Is severe period pain normal?
Moderate period pain is common and can be managed. Pain severe enough to prevent normal activities — needing to take time off work or school regularly, pain not controlled by standard OTC treatment — is not “normal” in the sense of being acceptable or untreatable. It warrants medical assessment to exclude endometriosis and other secondary causes, and to discuss more effective management strategies.
Can period pain indicate endometriosis?
Severe, progressive period pain — particularly pain beginning before bleeding, lasting throughout the period, associated with deep dyspareunia (painful sex), bowel or bladder symptoms around menstruation, or significantly impairing daily function — is a classic endometriosis presentation and warrants referral to gynaecology. See our detailed endometriosis guide: Endometriosis Guide.
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