Grade II rotator cuff injuries are defined as rotator cuff tears ranging from 1 to 3 cm. Rotator cuff injuries are generally categorized as partial rotator cuff injuries and total rotator cuff injuries. Total rotator cuff injuries are categorized according to two different methods, Post typing and Gerber typing: The Post classification is divided into four classes: Grade I injuries, where the extent of the tear does not exceed one centimeter. Grade II rotator cuff injuries have a tear of 1 to 3 cm, Grade III injuries have a tear of 3 to 5 cm, and most Grade IV injuries have a tear of more than five centimeters. The Gerber classification is divided into three levels: first-degree injuries are small: involving only one rotator cuff tendon; second-degree injuries are large: involving two or more rotator cuff tendons; and third-degree injuries are irreparable: involving two or more rotator cuff tendons. Grade II rotator cuff injury should go to a regular hospital in time, and the doctor will judge the specific condition according to the symptoms, signs and auxiliary examination, and give timely and correct treatment for the condition.