Sciatica means inflammation of the sciatic nerve and is the main nerve in the lower leg. Sciatica is a symptom not a diagnosis. It is the role of the chiropractor to examine and identify the underlying structures causing your symptoms. The three main areas that cause sciatica are either the lower back, sacroiliac joint, or hip. However, many other structures can be involved anywhere else on its course. The sciatic nerve is formed by nerves leaving the spine and travels through the pelvis, to your buttocks, then travels down the back of your leg to your foot. If your pain is down the side or front of your leg then it is likely to be a caused by a nerve other than the sciatic one.