An occipital nerve block is an injection of a steroid and local anesthetic (numbing medication) around the greater and lesser occipital nerves. These nerves are located on the back of the head just above the neck area. The steroid injected reduces the inflammation and swelling of tissue around the occipital nerves. This may in turn reduce pain, and other symptoms caused by inflammation or irritation of the nerves. Works for headaches over the back of the head, including certain types of tension headaches and migraine headaches. These nerves can often be injured in trauma such as whiplash from a motor vehicle accident. This procedure can be performed in the office under ultrasound guidance.