Congenital developmental factors are considered if the patient has no obvious history of trauma, pain, pressure, and other symptoms. If the patient has a history of trauma, pain and other symptoms are pathologic, such as clavicle fracture, lymph node enlargement and so on. 1. Physiologic: the skin in the clavicle area is relatively thin, especially for people with thin body type, there is a clear bulge at the acromioclavicular joint and sternoclavicular joint, if there is no symptom and history of trauma, it is considered to be due to congenital development. 2. Clavicle fracture: If there is a history of trauma with pain, there is a possibility of clavicle fracture, and the angular deformity caused by the broken end of the fracture forms a raised mass. 3. Enlarged lymph nodes: Enlarged lymph nodes are mostly caused by lymphadenitis and lymphatic tuberculosis, which can be accompanied by localized swelling and pain, as well as generalized fever. There is a bump on the clavicle, if the patient in the exclusion of physiological causes, should be in a timely manner to identify the cause of the disease, under the guidance of the doctor standardized treatment.