The reasons for the protrusion of the clavicle are divided into the following cases: 1, both sides are more prominent, looks more obvious but there is no discomfort in daily life, this situation is considered to be related to genetic factors. If the clavicle is asymmetrical on both sides and only one side is found to be more prominent, it is necessary to exclude trauma resulting in deformed healing of the clavicle after fracture, and if there is no trauma, it is more likely to be caused by a local bone tumor, bone cyst, or local soft tissue mass of the clavicle. If necessary, a CT scan of the clavicle should be done to further determine the specific cause.