A Separated Shoulder, also known as an Acromioclavicular Joint Separation or A/C Separation, is in injury causing damage to the ligaments joining the shoulder blade and collarbone. It is usually a tissue or ligament injury but, in some cases, may also involve a broken bone. It may occur due to a fall or direct hit at the top of the shoulder joint. Depending upon its severity, Shoulder Separation can be classified as: Type 1: A mild sprain or stretching in the ligaments in and around the joint. Type 2: The ligament is completely torn and the collarbone gets partially displaced. Type 3 to 6: Severe sprain with tearing of the muscles across the shoulder and neck. The Separated Shoulder may appear to be lower than the other one.