A piriformis block is an injection of hydrocortisone around the sciatic nerve in the piriformis muscle to reduce irritation of the sciatic nerve caused by a piriformis muscle strain. It is carried out under either x-ray and contrast or CT scanning. Piriformis blocks are used to treat piriformis syndrome which is a strain of the piriformis muscle in the lower buttock area.
This a non-operative treatment of sciatica caused by a piriformis muscle strain. It involves a day case injection of hydrocortisone under either x-ray and contrast or CT scanning.
It reduces inflammation from a strain with hydrocortisone.
It takes 20 to 30 minutes.
The risks are infection, bruising or injury to the sciatic nerve.