Lower Back Pain During Your Period: Why It Happens and What Helps
That dull lower-back ache is period pain too, driven by the same contractions as cramps. Here is why it happens and what actually eases it.
Back pain during your period is real period pain, just felt in your lower back instead of, or as well as, your belly. It is caused by the same thing as cramps: your uterus contracts to shed its lining, driven by compounds called prostaglandins, and that pain can radiate into your lower back and hips. For most people it is a normal, if annoying, part of their period, and it responds to the same relief that helps cramps.
Why do I get back pain during my period?
Back pain during your period comes from the same source as cramps. When your period starts, your body releases prostaglandins that make the muscular wall of your uterus contract to push out its lining. Those contractions cause pain that does not always stay put, it radiates outward into your lower back, hips, and sometimes your thighs. So a period backache is really cramp pain showing up in a different spot.
And cramp pain is near universal: the Cleveland Clinic notes that about 60% of people with a uterus have mild cramps during their period, so a back that joins in is in very ordinary company.
A few things influence how much back pain you feel.
It often arrives alongside the rest of the usual period symptoms, because it shares their cause: the hormone-driven work your body does during your Storm phase.
How to relieve back pain during your period
The good news is that period back pain responds to the same reliable toolkit as cramps, and stacking a few approaches works better than relying on one.
These sit inside the wider comfort playbook in our guide to feeling better on your period, and if belly cramps are part of the picture too, getting rid of period cramps covers those.
Period back pain is cramp pain in a different postcode. The same heat and anti-inflammatory that calm your belly usually calm your back.
Is it period back pain, or something else?
The giveaway is timing. Period back pain follows your cycle: it shows up in the day or two before and during your period, then fades as your period winds down. If your back pain reliably tracks your period each month, hormones are almost certainly the reason.
One nuance on that early arrival: the Office on Women’s Health lists backache among PMS symptoms, so an ache that reliably lands in the days before bleeding is its own pattern. We cover it in back pain that starts before your period.
Back pain that does not follow your cycle, that is there all month, or that is sharp, one-sided, or comes with other symptoms, is worth looking at separately, because it may not be period-related at all. Knowing your own pattern is what lets you tell the two apart.
When to see a doctor about period back pain
Most period back pain is manageable at home. Some is worth a doctor’s time, mainly when it is severe, changing, or not behaving like ordinary period pain.
Severe period pain that does not ease with standard relief can be a sign of a condition like endometriosis, which the NHS notes is worth investigating. And back pain with urinary symptoms is worth ruling out separately. None of this is likely, but it is easy to check and worth doing rather than simply enduring.
Period back pain FAQ
The takeaway: back pain during your period is cramp pain radiating into your lower back, driven by the same prostaglandins, and it usually eases with heat, an early anti-inflammatory, gentle movement, and rest. If it tracks your cycle, it is normal period pain. If it ignores your cycle or will not ease, that is the version worth a doctor’s time.
