Knee Instability: Reasons, Symptoms, Evaluation, Complications, Management And Rehabilitation Instability of the knee joint is a frequently seen joint issue where the knee feels weak. Many patients describe it as the knee slipping suddenly during daily activities or while changing direction. At our advanced clinic, we regularly treat such cases https://www.diigo.com/item/note/b2kov/mge3?k=26dcbc6d3797709a887dd5a10840a527