My mother had a total hip replacement 30 years ago. what are the signs she needs a new one?

Varies: Pain, instability, .

Thigh pain: With walking signs of loosening on xray.

Pain: First, if you're mom had a tha 30 years ago, she already has beaten the odds of needing a revision. She should be getting xrays every few years. The main finding of concern would be pain in her groin or her proximal thigh area. She should have a routine f/u to get an xray and an evaluation with her orthopaedic surgeon. Best of luck.