is pirifromis an inflamation of the joints
The piriformis is a small muscle in the buttock that stabilizes the sacroiliac joint. When irritated, it causes pain in the buttock. The piriformis muscle happens to overlap the sciatic nerve and can also cause sciatic pain down the leg all the way to the foot.uring the exam, the doctor may try to determine if the sacroiliac joint is the cause of pain by moving the joint. If the movement recreates the patientâs pain, and no other cause of pain has been found (such as a disc herniation on an MRI scan), the sacroiliac joint may be the cause of the pain.