Sciatica in pregnancy

Sciatica is a sharp, shooting or burning pain that starts in your lower back or bottom and travels down the back of one leg, sometimes with tingling, pins and needles, or numbness. It’s caused by irritation or pressure on the sciatic nerve — the long nerve that runs from your lower back down each leg — and it can flare up in pregnancy as your body changes.

A few pregnancy factors can bring it on: your growing bump shifts your posture and your centre of gravity, the hormone relaxin loosens your ligaments and joints (including in your pelvis), and later on your baby’s position can press on the nerve. It’s usually felt on one side, and can range from a niggle to a genuinely painful, movement-limiting ache. Like most pregnancy aches, it’s uncomfortable but not harmful, and it typically settles after birth.

There’s a lot you can do to ease it. Gentle movement usually helps more than resting completely, so keep moving within comfort. Try to:

• Mind your posture — stand tall, avoid slouching, and don’t stand on one hip.
• Sleep on the pain-free side, with a pillow between your knees to keep your hips and pelvis aligned, and one supporting your bump.
• Use warmth — a warm (not hot) compress or a warm bath can soothe the muscles.
• Try gentle stretches for your lower back and hips, and low-impact exercise like walking or swimming (the water takes the weight off beautifully).
• Avoid heavy lifting and sudden twisting, and get up and change position regularly if you’ve been sitting.

A women’s-health physiotherapist is genuinely worth seeing for sciatica or any back-and-pelvis pain in pregnancy — they can assess you, give you targeted exercises, and often provide real relief. Your GP or midwife can refer you. It’s also worth mentioning if you’d like advice on pain relief, as the safe options in pregnancy are limited (paracetamol may help; avoid anti-inflammatories like ibuprofen unless your doctor advises).

Most sciatica in pregnancy is manageable with these measures, but a few signs mean you should seek prompt medical advice. See your GP or maternity unit urgently if you develop:

• Weakness or numbness in both legs, or numbness around your saddle area (bottom, genitals, inner thighs)
• New difficulty controlling your bladder or bowels (leaking, or not being able to go)
• Severe or rapidly worsening back or leg pain

These are uncommon, but they can signal a nerve problem that needs urgent assessment.

It can help to know that the pain, while genuinely unpleasant, doesn’t mean any lasting damage is being done — it’s the nerve being irritated by the temporary changes of pregnancy, and it typically resolves once your baby is born and your body recovers. In the meantime, pace yourself: break up long periods of sitting, avoid the movements that set it off, and don’t push through activities that flare it badly. A pregnancy support belt, and a cushion in the small of your back when you sit, can take some of the load off through the day.

For the everyday shooting leg pain, though, gentle movement, good posture, warmth, side-sleeping with a pillow between your knees, and a physio referral cover most of it — and it eases once your baby arrives.