Why You Get Back Pain During Your Period — and How to Find Relief
Period back pain is extremely common but not something you have to just endure. Understanding the cause helps you find the right relief.
If you've wondered why your lower back throbs during your period, you're not alone. The short answer: the same biological process that causes uterine cramps also drives your back pain. It's all driven by hormone-like compounds called prostaglandins that cause your uterus to contract — and those sensations radiate outwards.
Why Does Your Back Hurt During Your Period?
When your period starts, your body releases prostaglandins to help the uterus shed its lining. These chemicals cause uterine muscles to tighten and relax. Intense contractions create a ripple effect, sending pain signals to the surrounding muscles and nerves in your pelvis, lower back, and thighs. UK survey data shows nearly 97% of girls report painful periods at some point, with 24% experiencing them every cycle.
This radiating sensation is called "referred pain" — your brain gets mixed signals from the dense nerve network in your pelvic region and interprets the pain as coming from your lower back rather than your uterus.
Concerned about your health?
See a Gynaecology specialist at The Vesey, Sutton Coldfield. Open 7 days, 8am–8pm.
Primary vs Secondary Dysmenorrhoea
| Feature | Primary Dysmenorrhoea | Secondary Dysmenorrhoea |
|---|---|---|
| Cause | Prostaglandins — normal menstruation process | Underlying condition: endometriosis, fibroids, PID, adenomyosis |
| Onset | Within 6–12 months of first period | Often 20s–40s, develops over time |
| Pain timing | Starts at/just before period; lasts 1–3 days | Can start a week before, lasts throughout cycle |
| Pattern | Often lessens with age or after childbirth | Gets worse over time |
| Response to ibuprofen | Usually effective | Often poor |
Effective At-Home Relief
- Heat — hot water bottle on lower back or abdomen for 15–20 minutes. As effective as some painkillers for cramping.
- NSAIDs — ibuprofen or naproxen block prostaglandin production. Take at onset, before pain peaks.
- Gentle movement — cat-cow pose, child's pose, knee-to-chest stretch. Releases endorphins and muscle tension.
- Warm bath — with Epsom salts for magnesium, which helps muscle relaxation.
When to See a Doctor
Book a GP appointment if: pain is getting progressively worse each cycle; pain starts a week before your period; standard painkillers provide no relief; you have pain during sex, heavy bleeding, or fertility concerns. These symptoms may indicate endometriosis, fibroids, or PID — conditions that need a proper diagnosis. UK data shows chronic pelvic pain affects around 38 per 1,000 women in primary care — it is a recognised medical condition, not something to simply endure.
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The Vesey Private Hospital, Sutton Coldfield · Open 7 days · 8am–8pm · 0121 387 3727