Knee Instability: Causes, Symptoms, Diagnosis, Risks, Treatment And Recovery Instability of the knee joint is a common musculoskeletal condition where the knee feels loose. Many patients describe it as the knee losing balance during movement or while standing up. At our advanced clinic, we commonly manage such cases using both https://www.diigo.com/item/note/b2kov/mge3?k=26dcbc6d3797709a887dd5a10840a527