Knee Joint Instability: Factors, Signs, Diagnosis, Risks, Treatment And Recovery Instability of the knee joint is a widely reported orthopedic problem where the knee feels weak. Many patients describe it as the knee slipping suddenly during movement or while changing direction. At our advanced clinic, we commonly manage such cases https://medium.com/@linda.wockhardthospitals/knee-joint-instability-causes-symptoms-dagnosiis-risks-treatment-and-recovery-0154cb37c8c4