Knee Joint Instability: Causes, Symptoms, Diagnosis, Complications, Management And Rehabilitation Instability of the knee joint is a common joint issue where the knee feels loose. Many patients describe it as the knee losing balance during daily activities or while standing up. At our advanced clinic, we frequently diagnose such cases https://www.diigo.com/item/note/b2kov/mge3?k=26dcbc6d3797709a887dd5a10840a527