GUIDE
The growing uterus, weight changes, and relaxin-loosened joints can compress or irritate the sciatic nerve, causing pain that radiates from the lower back through the buttock and down the leg.
Sciatica during pregnancy can range from a mild tingling to intense, shooting pain. While it is uncomfortable, it is usually not a sign of a serious problem and responds well to stretching, positioning, and physical therapy.
Be prepared from day one
Sciatica is a distinctive type of pain that follows the path of the sciatic nerve — from the lower back, through the buttock, and down the back of the leg. It can feel like a shooting, burning, or electric-shock-like sensation that radiates from the lower back or hip down through the leg. Some people also experience tingling, numbness, or weakness in the affected leg.
The sciatic nerve is the longest and thickest nerve in the body, about as wide as a finger. During pregnancy, several factors can irritate it: the growing uterus and baby can press directly on the nerve or on the muscles surrounding it. The hormone relaxin loosens the pelvic joints, which can shift alignment and pinch the nerve. Changes in posture — the increased lumbar curve that compensates for a growing belly — can also contribute.
True sciatica (nerve compression causing radiating leg pain) affects about 1 percent of pregnancies. However, many more people experience sciatic-type symptoms from tight or spasming piriformis muscle, which sits directly over the sciatic nerve in the buttock. This is sometimes called piriformis syndrome and responds very well to stretching.
Sciatica most commonly appears in the second and third trimesters as the baby grows larger and the uterus expands. It tends to worsen in the third trimester when the baby's weight is greatest and the baby may shift into positions that press on the nerve directly.
The pain often fluctuates — it may be worse on some days and barely noticeable on others, depending on the baby's position, your activity level, and how much you have been sitting. Long periods of sitting, especially in soft or unsupportive chairs, tend to aggravate sciatica.
Unlike general pregnancy back pain, which is usually felt across the lower back, sciatica follows a specific path down one leg. If your back pain does not radiate below the buttock, it is more likely muscular back pain than sciatica.
The cornerstone of pregnancy sciatica treatment is stretching the piriformis muscle and maintaining good pelvic alignment. Consistent daily stretching is more effective than occasional intense stretching sessions.
From hands and knees, bring one knee forward and angle it slightly outward while extending the other leg behind you. Hold for 30 seconds on each side. This stretches the piriformis muscle, which sits over the sciatic nerve and can contribute to compression when tight. Do this 2 to 3 times daily.
Sit in a chair with feet flat on the floor. Place the ankle of the affected side on the opposite knee. Gently lean forward until you feel a stretch in the buttock. Hold for 30 seconds. This is a safer option if getting on the floor is difficult in late pregnancy.
Apply a heating pad on low to medium setting or a warm towel to the lower back and buttock on the affected side for 15 to 20 minutes. Warmth increases blood flow, relaxes muscles, and can reduce nerve irritation. Some people alternate with cold packs — 10 minutes warm, then 10 minutes cold.
The buoyancy of water takes the weight off the sciatic nerve and allows you to move and stretch without pain. Swimming, water walking, and prenatal water aerobics are some of the most effective forms of exercise for pregnancy sciatica. Even just floating can provide temporary relief.
A physical therapist experienced in prenatal care can assess your specific pattern of sciatica and design a targeted exercise and stretching program. They can also use techniques like soft tissue mobilization and nerve gliding exercises that provide significant relief. Ask your provider for a referral.
Sleep on the side opposite the pain with a firm pillow between your knees and another supporting your belly. This keeps your pelvis aligned and reduces pressure on the sciatic nerve. A long body pillow can help maintain this position throughout the night.
These symptoms can occasionally signal something that needs medical attention. When in doubt, call.
Pregnancy sciatica almost always resolves after delivery. Once the baby is born, the weight is off the nerve, your posture normalizes, and relaxin levels drop — most people feel dramatic improvement within weeks. For some, the relief is immediate.
In the meantime, consistent stretching and proper positioning can make a significant difference. Many people find that once they identify the stretches that work for them and do them daily, the pain becomes much more manageable.
For related discomforts, see our guides on pregnancy back pain for general lower back management, leg cramps during pregnancy if you are also experiencing calf cramps, and pregnancy insomnia if sciatic pain is disrupting your sleep. A round ligament pain guide is also available if you are experiencing multiple types of pregnancy-related pain. For overall body support strategies, see swollen feet during pregnancy.
This guide is for informational purposes only and is not a substitute for professional medical advice. Always consult your healthcare provider with any questions about your pregnancy.
