Occipital Nerve Blocks are simple outpatient procedures performed to reduce the inflammation and swelling of tissues surrounding the occipital nerves. The occipital nerves are located on the back of the head just above the neck area. During this procedure a special mixture of local anesthetic and steroid medication is injected around the nerves. This injection results in reduced pain related to the inflammation or irritation of the nerves and surrounding structures. Typically, headaches over the back of the head, including certain types of tension and migraine headaches respond well to occipital nerve blocks. Following the injection, immediate effects can be felt due to the local anesthetic injected. This wears off in a few hours. The steroid starts working in about 3 to 5 days and its effect can last for several days to a few months.