Your piriformis muscle is attached to bone that is located just above the tailbone in the lower buttocks area. Strain of this muscle is called piriformis syndrome, which results in pain. Tightness of this muscle can cause sciatica. A piriformis block targets this specific area to provide pain relief.

How it Works

A piriformis block is injected around the sciatic nerve, in the piriformis muscle. The injection contains a local anesthetic and a steroid. It is performed in order to reduce irritation and inflammation of a nerve that is caused by piriformis muscle strain.

What to Expect

The injection is performed using x-ray imaging for accuracy, and takes 20 to 30 minutes. You will feel almost immediate relief from the anesthetic that is used, and further relief in three to seven days from the steroid.

There is some risk of bruising and infection, but this is not common. You may experience redness and soreness at the injection site, which is temporary. You will be able to resume regular activities the next day.