Sciatica is a medical condition caused by inflammation of your sciatic nerve, which serves your lower back and each leg down to your toes. Sciatica during pregnancy is common due to changes in your posture, body weight and increased pressure on your back from your growing baby. According to the Mayo Clinic and the National Library of Medicine, symptoms of sciatica in pregnancy include muscle cramps and numbness.
Aches
Sciatica during pregnancy may cause you to experience more aches in your lower back, and the aches may extend into the muscles of your buttocks and thighs.