Piriformis syndrome is a condition where the buttock’s piriformis muscle presses on the sciatic nerve running up the back of the leg. This pressure creates pain in the buttock and back of the leg. While Piriformis involves the sciatic nerve, it is different from sciatica and is often misdiagnosed as sciatica.
Piriformis syndrome can occur spontaneously or after overuse or injury. The piriformis muscle becomes tight, tender, and contracted, leading to deep aching pain in the buttock that is sometimes associated with pain radiating down the back of the leg.
A piriformis syndrome injection deposits a small amount of local anesthetic and steroid, for anti-inflammation, into the muscle to relieve pain.