Double shoulder pain may be caused by physiological factors, or it may be caused by frozen shoulder, cervical spine disease, rheumatic disease and other diseases. 1. Physiological factors: mainly exertion, carrying heavy things, etc., if the weight is relatively large, it may cause the accumulation of local lactic acid, resulting in shoulder pain. 2. Pathological factors (1) Frozen shoulder: if you always feel pain and discomfort in both shoulders, first of all, you should consider that it may be caused by periapical diseases, of which the most common one is frozen shoulder. This is a kind of disease that is more common among middle-aged and old people, and it will lead to soreness, pain and other uncomfortable symptoms in the shoulder joints, and in serious cases, the shoulder joints may also be restricted. (2) Cervical spondylosis: If shoulder pain and stiffness are accompanied by shoulder swelling and discomfort, it is necessary to consider that it may be caused by cervical spondylosis, which is mostly seen in cervical spondylosis of the nerve root type. (3) Rheumatic diseases: For example, rheumatoid arthritis may involve both sides of the symmetrical joints at the same time, which may lead to the simultaneous onset of bilateral shoulder joints, followed by bilateral shoulder pain, stiffness and unfavorable movement. If the symptoms continue to be unrelieved, it is recommended to go to the hospital for examination as soon as possible, so that the doctor can clarify the cause of the disease and give targeted treatment.