The most effective way to diagnose rotator cuff injury is to take X-ray film, MRI and so on. 1. X-ray film: X-ray film can observe whether the patient’s shoulder has osteophytes or hooked shoulder, etc. Generally, there is a possibility of rotator cuff injury, because these two symptoms can cause rotator cuff injury. 2. Nuclear magnetic resonance: nuclear magnetic resonance is a common way to check rotator cuff injury, through the examination of local soft tissues, it can clearly observe whether there are tears, edema and other conditions in the rotator cuff, and can accurately find the rotator cuff injury, which can provide a more reliable basis for the subsequent treatment. Once diagnosed with rotator cuff injury, it is recommended that the patient should receive regular treatment in time, and at the same time pay attention not to overuse the shoulder during the treatment period, so as not to cause secondary injuries.