Sciatica usually affects only one leg at a time, although it is possible for it to occur in both legs.

The main symptom of sciatic pain is pain that radiates from your lower spine to your buttock and down the back of your leg.

Back pain and sciatica are common during pregnancy, because the weight and position of the baby adds pressure to the spinal nerves. Pregnancy hormones also cause the ligaments to loosen, which may cause the spine to be unstable, leading to pinched nerves or a slipped disc.

The most common cause of sciatic pain is a herniated or slipped disc that puts pressure on the nerve root.

Many back problems are linked to a weak core (the muscles of the back and abdomen). By strengthening your core through exercises, you’re increasing support for your lower back.