Sciatica is a medical condition characterised by pain going down the leg from the lower back.[1] This pain may go down the back, outside, or front of the leg.[3] Onset is often sudden following activities like heavy lifting, though gradual onset may also occur.[5] Typically, symptoms are only on one side of the body.[3] Certain causes, however, may result in pain on both sides.[3] Lower back pain is sometimes but not always present.[3] Weakness or numbness may occur in various parts of the affected leg and foot.[3]