"It's a muscle that kind of clamps down on my sciatic nerve, and it was shooting down my leg," the actress said during an appearance on 'The Drew Barrymore Show'

According to the Cleveland Clinic, piriformis syndrome causes pain or numbness in a person’s butt, hip or leg. The pain typically occurs when the body’s piriformis muscle presses on the sciatic nerve which results in inflammation.

Andie MacDowell is feeling grateful she never had to have the hip replacement surgery she was anticipating. The Groundhog Day actress opened up about a painful diagnosis she recently received and the "miracle" that a little physical therapy has done for her.