Pregnancy Care

Sciatica in Pregnancy: What It Is, What Helps and When to Worry

by BMB Editorial Team

15 OCT 2026

A pregnant mum rests on her side on a sofa with a pillow between her knees to ease sciatica in pregnancy, in a softly lit lavender and cream living room

Sciatica in pregnancy is pain from an irritated sciatic nerve: a sharp or burning pain that runs from your bottom down the back of one leg, often into your foot, sometimes with tingling or numbness. True sciatica is less common than many mums think. More often, the pain comes from your pelvic joints or lower back. Most of it eases with gentle exercise, physiotherapy, side-sleeping with a pillow and warmth. A few signs, such as numbness between your legs, need urgent care.

Is it sciatica, pelvic girdle pain or ordinary back pain?

How much leg pain in pregnancy is true sciatica? Not much. One review puts sciatica at only about 1% of pregnant women (Katonis and colleagues, 2011), and a slipped disc pressing on a nerve has been reported in about 1 in 10,000 pregnancies (Whiles and colleagues, 2020). Pelvic girdle pain affects up to 1 in 5 pregnant women (NHS), and low back pain more than two in three (Cochrane). Our reading: if your bottom and thigh hurt, PGP or back pain is the likelier cause. Only a doctor or physiotherapist can say for sure.

What actually helps, according to the research?

The best summary is a Cochrane review of 34 trials with 5,121 pregnant women (Liddle and Pennick, 2015), still the latest Cochrane review on this that we could find. It covers back and pelvic pain, not sciatica alone, and most of its evidence is low to moderate quality.

Exercise

Exercise on land or in water may reduce low back pain (low-quality evidence). An 8 to 12 week programme meant fewer women reported back and pelvic pain (moderate-quality evidence).

Physiotherapy

The NHS refers mums with PGP to pregnancy physiotherapists for pelvic floor, tummy, back and hip exercises. In single Cochrane studies, hands-on therapy plus exercise and education eased pain.

Support belts

Mixed. In one small trial a soft belt gave no clear benefit; in another it eased pain more than exercise alone. Both were low quality. Your physio may still suggest one for PGP (NHS).

Acupuncture

Single studies suggest it eases pelvic pain more than usual care, but one trial found no clear difference from sham (pretend) acupuncture.

For true sciatica, the NHS advises staying active, gentle exercise and heat packs, with physiotherapy as a main treatment. Our women's health physiotherapists at Orchard (Paragon) start with an individual assessment of how you move, then give you clear next steps.

Can a prenatal massage help sciatica?

It may ease the aches, but it is not a proven fix. A 2021 review of 12 trials found relaxation massage in pregnancy reduced back and leg pain, stress and anxiety, with only minor side effects (Mueller and Grunwald, 2021). But several trials measured pain just before and after one session, and none studied sciatica. European guidelines found no evidence for massage alone for PGP, though it can be part of a wider plan.

So we see massage as comfort care alongside exercise and physio. Our prenatal massage page lists relief of sciatic nerve pain among the discomforts mums report; that is what mums tell us, not a trial result. We recommend prenatal massage from 16 to 36 weeks of pregnancy. Past 36 weeks, we need a doctor's letter of approval before booking. With a high-risk pregnancy, check with your doctor first. Pain mostly at the front? Read about painful groins and prenatal massage, or our checklist for choosing a prenatal massage provider.

What can I do at home to ease it?

  • Sleep on your side, the safest way to go to sleep in pregnancy (NHS), with a pillow between your knees and one under your bump.
  • Keep moving. Gentle walks help; avoid sitting or lying still for long (NHS).
  • Mind your posture. Sit supported, wear flat shoes, and turn your feet instead of twisting. With PGP, keep your knees together getting into the car.
  • Use warmth: a heat pack or a warm bath (NHS).
  • Skip heavy lifting. Bend your knees and keep your back straight.

Which kind of pain is it? A quick symptom sorter

Answer three questions for the likely type of pain and who to see. A rough guide only, not a diagnosis.

1. Where is the pain worst?
2. What does it feel like?
3. Do any of these apply? Tick all that fit.

Back pain in the second or third trimester can be a sign of early labour, so the NHS advises contacting your doctor or midwife urgently about it. Nothing you enter here is saved or sent anywhere.

When is leg or back pain an emergency?

Go to A&E now, or call 995 for an ambulance, if you have:

  • numbness around your genitals or bottom (the “saddle” area)
  • new trouble peeing, or loss of bladder or bowel control
  • loss of feeling in a leg, or weakness or numbness in both legs that is severe or getting worse

The NHS says these need hospital treatment as soon as possible. Do not drive yourself.

Call your gynae or delivery hospital urgently if back pain comes with a fever, bleeding from your vagina or pain when you pee, pain under your ribs, or tightenings. The NHS also says back pain in the second or third trimester could be a sign of early labour.

Frequently asked questions

Is sciatica common in pregnancy?

No. True sciatica affects about 1% of pregnant women, in one review. Low back pain affects more than two in three, and pelvic girdle pain up to 1 in 5. Pelvic pain can also spread into the thigh.

Can a prenatal massage help sciatica?

It may ease aches. A 2021 review of 12 trials found massage reduced back and leg pain in pregnancy, but none studied sciatica. Use it alongside exercise and physiotherapy, not instead.

Which sleeping position helps sciatica in pregnancy?

Lie on your side, left or right, with a pillow between your knees and another under your bump. The NHS says side-sleeping is the safest way to go to sleep in pregnancy.

Will sciatica go away after birth?

Usually it eases. The NHS says sciatica usually gets better in a few weeks to a few months. Pelvic girdle pain often lasts until birth, then drops to about 7% of women within three months, according to European guidelines.

When should I see a doctor about sciatica in pregnancy?

Go to A&E now for numbness between your legs, bladder or bowel changes, or worsening leg weakness. Call your gynae urgently for back pain with fever, bleeding or tightenings. See your doctor if pain is not easing after a few weeks.

Is physiotherapy safe in pregnancy?

Yes, for most mums. The NHS refers pregnant women with pelvic pain to physiotherapists, and in the Cochrane review any reported side effects were minor and short-lived. Tell your physio how far along you are.

Sources

This article is general information, not medical advice, and cannot diagnose any condition. If you are worried about pain in your back, pelvis or legs, please see a doctor. Published 15/10/2026.