Some shoulder pain can be diagnosed by taking plain films. However, not all of these symptoms can be clearly diagnosed by radiographs. There are many causes of shoulder pain and radiographs are only able to rule out any bony injury to the shoulder, such as a fracture or a bony deformity. However, in clinical cases of shoulder pain, the following steps need to be taken in order to clarify the diagnosis as well as the cause: i. First, ask the patient’s medical history to find out if there is any cold in the shoulder or if there is any trauma. Second, a thorough physical examination of the patient should be performed. By physical examination, we mean that the doctor first does a preliminary examination of the patient by using both hands as well as simple instruments. The doctor will generally check the cause of the current pain. Third, to do the corresponding auxiliary examination for the above-mentioned symptoms. For example, depending on the results of the physical examination, the doctor may arrange a series of auxiliary examinations such as plain film, CT, MRI, etc. Not all examinations are required. It is not necessary to do all the tests, but the doctor will select the corresponding auxiliary tests according to the patient’s own situation to clarify the diagnosis and differential diagnosis.