Hip refers to the hip joint, at the junction of the human torso and lower limbs, mainly due to the acetabulum, and the femoral head and neck of the femur, is one of the largest joints in the human body, the main function is to bear weight and walk. The hip joint is surrounded by strong ligaments and muscle attachments, and the joint structure is stable, enabling the hip joint to have the functions of hip flexion, hip extension, internal retraction and external rotation. If there is pain in the hip joint, it may be a fracture caused by a violent irritation, in addition, it may be a symptom caused by necrosis of the femoral head, inflammation of the joint cavity, synovitis and other diseases. If there is discomfort in the hip joint, abnormal function, pain and swelling, you should go to the regular hospital as soon as possible for examination, to clarify the cause of the disease, and follow the doctor’s instructions for treatment.