Pelvic pain in men may be related to the following reasons: 1) previous pelvic old injury, such as previous pelvic fracture, there may be a possibility of this pain after recovery.2) new soft tissue injuries, such as when the patient is in strenuous activities, may cause tendon strain, these tendons attached to the pelvic area, there may be a possibility of producing pelvic pain around the pelvic area.3) osteoporosis, there are Many osteoporosis patients, especially elderly men, will produce bone pain, sometimes in the position of the pelvis. 4, sacroiliac joint lesions, if the patient has sacroiliac arthritis, ankylosing spondylitis and other diseases, will produce pain in the back side of the pelvis, which is often seen in young men. 5, hip joint lesions, such as the presence of necrosis of the femoral head of the hip joint, there may be Pain in the outer side of the pelvis.