Back pain in pregnancy affects most people at some point, usually starting in the second trimester and often getting worse as the bump grows. It’s rarely a sign of anything serious, but that doesn’t make it any less uncomfortable — here’s why it happens and what actually helps.
Why Back Pain Happens During Pregnancy
Several things combine to cause pregnancy-related back pain. The hormone relaxin loosens ligaments throughout the body, including those supporting the spine, to prepare for birth — but this also makes the back less stable. Add to that a shifting centre of gravity as the bump grows, weight gain, and postural changes as you naturally lean back to compensate, and the lower back ends up carrying more strain than usual.
Types of Pregnancy Back Pain
- Lumbar pain — felt in the lower back, above the tailbone, often worse after standing or sitting for long periods.
- Posterior pelvic pain — felt lower down, near the dimples above the buttocks, and can radiate into the thigh; often linked to pelvic girdle pain.
- Sciatica — sharp or shooting pain running from the lower back down through the buttock and leg, caused by pressure on the sciatic nerve.
Ways to Relieve Back Pain
- Practise good posture — avoid slouching and try not to stand for long periods without a break.
- Wear supportive, low-heeled shoes — flat, cushioned shoes reduce strain compared to heels or completely flat, unsupportive footwear.
- Sleep on your side with a pillow between your knees — this keeps the spine and hips aligned overnight.
- Try gentle exercise — swimming, walking, and pregnancy yoga can strengthen supporting muscles without high impact.
- Use a birthing ball — sitting on one instead of a regular chair encourages better posture and can ease lower back tension.
- Apply heat — a warm (not hot) compress on the lower back can ease muscle tension safely during pregnancy.
When Physiotherapy Might Help
If back pain is persistent, severe, or affecting daily activities, a GP or midwife can refer you to physiotherapy, which often includes manual therapy, postural advice, and targeted strengthening exercises. This is especially worth pursuing if pain feels like it’s centred around the pelvis rather than purely the lower back, as this may point to pelvic girdle pain, which benefits from a slightly different approach.
When Back Pain Needs Urgent Attention
Most pregnancy back pain is uncomfortable but not dangerous. However, contact your midwife or maternity unit promptly if back pain comes with a fever, is severe and sudden, comes with regular tightening or contractions before term, or is accompanied by vaginal bleeding or unusual discharge — these combinations can occasionally signal something that needs checking, such as a urinary tract infection or preterm labour.
FAQs
Is back pain in early pregnancy normal?
Some back pain can start even in the first trimester due to hormonal changes, though it typically becomes more noticeable in the second and third trimesters as the bump grows.
Can I take painkillers for pregnancy back pain?
Paracetamol is generally considered safe during pregnancy for pain relief, but always check with a pharmacist, GP, or midwife before taking anything, including over-the-counter options.
Does pregnancy back pain mean labour is starting?
Not usually — ongoing back pain is common throughout pregnancy, though a sudden change in pattern, especially with regular tightening, is worth mentioning to your midwife.
