Sciatica refers to inflammation of the sciatic nerve that travels from the buttock down the back of the leg into the lateral aspect of the foot. There are many causes of sciatica. A very common cause, however, is compression of the L5 or S1 nerves in the lower lumbar spine due to a disc protrusion or a bone spur. Dr. Ghosh has substantial expertise in the medical, nonsurgical, and surgical management of patients with sciatica.