Sciatica and Leg Pain During Pregnancy: Causes, Safe Relief and When to Seek Help

Why Pregnancy Brings Buttock and Leg Pain

Pregnancy changes the body in several ways that can irritate the lower back, pelvis and nerves:

• Hormonal ligament laxity — Hormones such as relaxin soften pelvic ligaments, so the sacroiliac joints and pubic joint move more than usual.
• A shifting centre of gravity — The growing uterus changes posture and increases the curve of the lower back.
• Added load — Extra weight and fluid increase demand on the hips and spine.
• Pressure on nerves and muscles — Deep buttock muscles can tighten and the baby's position can contribute to nerve irritation.

Is It Sciatica or Pelvic Girdle Pain?

Many women describe their symptoms as sciatica, but much of the pain in pregnancy comes from the pelvic joints and surrounding muscles rather than a compressed nerve root. Pelvic girdle pain tends to be felt over the sacroiliac joints or at the pubic bone, and is worse with turning in bed, stairs or standing on one leg. True sciatica more often shoots below the knee with tingling or numbness. A hands-on assessment helps tell them apart. See our guide on conditions that mimic sciatica.

Safe Self-Care Ideas

• Sleep on your side with a pillow between your knees and another under the belly.
• Take short, frequent walks and avoid long periods of sitting or standing.
• Use warm, not hot, compresses on the lower back and buttock.
• Keep knees together when getting in and out of the car or bed.
• Avoid single-leg loading and wide-legged positions when painful.
• Use a supportive maternity belt if it helps you.

Check with your doctor or midwife before starting any new exercise or using any product during pregnancy.

How Osteopathy Can Help

Gentle, pregnancy-adapted osteopathic techniques can ease tension in the lower back, pelvis, hips and deep buttock muscles. Treatment is adjusted to each trimester and to your comfort, using positions and pillows that suit a growing belly. See also pregnancy back pain treatment.

How Physiotherapy Can Help

Our physiotherapists can prescribe safe, targeted exercises for the pelvic floor, hips and trunk, teach positioning and movement strategies, and advise on support belts and daily activities.

When to Contact Your Doctor or Midwife Promptly

• Severe or sudden back pain, especially with bleeding, fluid leakage or regular contractions.
• Fever, burning with urination, or pain in the flank.
• Numbness in the groin or inner thighs, or bladder or bowel changes. This needs urgent care.
• Marked swelling or pain in one calf.

When pain is mechanical and not alarming, conservative care is generally appropriate. Read more in our sciatica red-flag guide.

Book a Sciatica Assessment at Réhabital

Our physiotherapists and osteopaths in Côte Saint-Luc work side by side to find what is actually irritating your sciatic nerve and build a plan around it. Book online or read more about sciatica treatment at Réhabital.