Bursitis is an inflammation of a sac of fluid called bursa which is present around a joint. Sciatica refers to compression or stretching of the sciatic nerve. Both are different medical conditions. Bursitis can be treated with injection of steroids locally. Sciatica on the other hand is usually treated with Physical therapy, medications for pain. Imaging usually in the form of an MRI helps determine the cause of the sciatica. Sometimes if symptoms do not improve, referral to a Neurosurgeon is appropriate to discuss other treatment options including surgery.