A bony bump on the clavicle fracture may be caused by bone scab, malunion of fracture, hematoma and other reasons. 1. Bone scab: In the process of fracture healing, the interrupted hematoma will gradually mechanize to form a bone scab, which will appear on the surface of the clavicle as a bony bump. 2. Fracture deformity healing: when the fracture is displaced during the healing process or poorly repositioned by manipulation, it will result in deformity of fracture healing, and a raised bag will appear on the surface of the clavicle. 3. hematoma: hematoma is formed after clavicle fracture, and the hematoma starts to condense into a blood clot containing reticulated fibrin, resulting in a raised bag on the clavicle fracture. When the clavicle fracture on the raised bag and long-term can not be eliminated, it is recommended to go to the regular hospital specialist in time to improve the relevant examination, clear cause of the disease and follow the doctor’s instructions to give targeted treatment and treatment.