# Understanding Shoulder Instability: Symptoms, Causes, And Care The shoulder is one of the most flexible joints in the body, allowing you to lift, rotate, and move your arm in many directions. However, this high flexibility also makes it more likely to become unstable. **Shoulder Instability: Causes, Symptoms, Diagnosis, Risks, https://medium.com/@linda.wockhardthospitals/how-modern-knee-replacement-helps-you-return-to-an-active-lifestyle-c92d742b724c