The common causes of pubic bone protrusion are congenital developmental factors leading to local protrusion of pubic bone, pathological reasons, pubic bone tumor, etc., as follows: 1. congenital developmental factors leading to local protrusion of pubic bone: patients mostly do not have any clinical symptoms, which can be confirmed by taking CT or X-ray, and do not need special treatment. 2. pathological reasons: such as pubic bone fracture in the repair process without accurate alignment relationship, leading to local hyperplasia, or even angular deformity, which can cause local bony protrusion and sometimes painful symptoms when pressing. 3. pubic bone tumor: although bone tumor is relatively rare, metastatic tumor is not uncommon. The local bony prominence can be caused by angular deformity, and sometimes there will be painful symptoms when pressing. 3, pubic bone tumor: although bone tumor is relatively rare, metastatic tumor is not uncommon. If malignant tumor cells from other parts of the body metastasize to pubic bone through blood circulation or lymphatic route, it can cause local hyperplasia and bone destruction, resulting in local protrusion, and patients usually have obvious pain and swelling, and the symptoms are more obvious when pressing.