Andie MacDowell, 66, diagnosed with painful neuromuscular disorder

"St. Elmo's Fire" actress Andie MacDowell revealed she's been diagnosed with piriformis syndrome and shares how she avoided hip replacement surgery.

"I thought I was going to have hip replacement — thank God, my hips are fine," she remarked. "I have piriformis syndrome, so it's a muscle that kind of clamps down on my sciatic nerve, and it was shooting down my leg." Stephanie Giang-Paunon is an Entertainment Writer for Fox News Digital. Story tips can be sent to stephanie.giang@fox.com and on Twitter: @SGiangPaunon.

Piriformis syndrome occurs when your piriformis muscle compresses your sciatic nerve and results in inflammation. It can cause pain or numbness in your buttock and down the back of your leg. It can happen on one side of your body or both, according to the Cleveland Clinic.