A hard ball under the raphe is usually caused by developmental abnormality, local tumor or hypertrophy of the raphe due to overgrowth of bone. 1. Developmental abnormality: due to the patient’s own genetic factors or local trauma during the growth and development period, resulting in abnormal development of the subacromial bone, if it is not accompanied by pain and other special discomforts, there is no need for special treatment. 2. Local tumor lesions: such as subacromial osteochondroma, which usually has no special discomfort symptoms, can be further diagnosed through X-ray and CT examination, and can be surgically removed if it really affects the local aesthetics or causes compression. 3. Osteomalacia: mostly occurring in middle-aged and old-aged patients, caused by degenerative changes or trauma and other factors, some of them are accompanied by local pain and discomfort, and the formation of local bony encumbrances leads to hypertrophy of the raphe to form the manifestation of hard ball. If there is a hard ball under the raphe, if it is not accompanied by other special discomfort, there is no need for special treatment, if it is accompanied by pain and other uncomfortable symptoms, you need to go to the hospital in time to make a clear diagnosis.