Sciatica occurs when the sciatic nerve is compressed or irritated. The sciatic nerve is the main nerve that travels from the low back to the legs. There could be many possible causes but the most common cause is due to muscle tightness in the low back and buttocks. Chiropractic care is very helpful for sciatica. Your chiropractor will take a full history and give a thorough examination of your sciatic complaints and other injuries and complaints. He will develop an appropriate course of treatment including chiropractic care, diagnostic imaging, and referrals to other medical professionals as needed.