The connection between waist and buttocks is sacroiliac joint, sacroiliac joint pain has more causes, mainly bone tissue disease, in addition, pregnancy, trauma and other factors can also cause.
1. Bone tissue diseases: such as ankylosing spondylitis, etc., the lesions can involve the sacroiliac joints, resulting in cartilage destruction, hardening, joint stiffness, narrowing of the gap, the patient often manifested as a dull pain in the lower lumbar region, chills, malaise, low-grade fever, etc., and with the progression of the disease, the stiffness of other joints can also occur.
2. Violence, fierce collision, etc.: powerful external force can cause sacroiliac joint dislocation, sacroiliac joint ligament injury and sacral fracture, often manifested as severe pelvic pain and difficulty in turning over. Pregnancy causes laxity of ligaments at sacroiliac joints, which can also cause sacroiliac joint pain.
Sacroiliac joint tuberculosis, chondrosarcoma, osteosarcoma and other diseases can cause sacroiliac joint pain, sacroiliac joint pain and can not be relieved after resting, especially those who have a history of trauma and disease, should go to the hospital in time for consultation.