The common causes of thigh root pain behind the hip may be the following: a. Elderly patients can have painful symptoms of thigh root due to osteoporosis and inadvertent fall that can cause fracture of the femoral head. At this time, the patient can improve the local X-ray or CT examination to clarify the severity of the bone fracture, if necessary, as soon as possible to perform hip replacement to restore the continuity of the thigh root bone, which can effectively relieve the pain symptoms. Second, patients who often work out and exercise, due to prolonged exercise, can cause muscle strain at the root of the thigh behind the buttocks, causing painful symptoms. At this time, local ice can be applied to reduce the exudation of the tissue. 24 hours later, hot aman pack can be used, blood circulation and stasis cream continuous external application to promote the absorption of local inflammation, the pain symptoms can be completely relieved after 3-5 days for patients with mild symptoms.