Pain at the lateral joint of thigh root may be caused by local injury, excessive exercise, synovitis of hip joint, necrosis of femoral head and so on. 1. Local injury: soft tissue injury is easily caused by impact and knocking on the lateral joint of the thigh root, and the patient will have pain, which may be accompanied by redness, swelling, ecchymosis, restriction of activities and other abnormal symptoms. Local hot compresses and massage can be used to relieve the pain. 2. Excessive exercise: usually less activity or not enough warm-up before exercise, sudden large amount of exercise, easy to cause the accumulation of lactic acid caused by pain, rest can generally be relieved. 3. Hip synovitis: more common in the elderly, belongs to the degenerative disease of the hip joint, may appear pain, activity limitation, joint stiffness, dysfunction and other symptoms. It can be treated with local physical therapy under the guidance of doctor and oral medication such as celecoxib capsule. 4. Necrosis of the femoral head: excessive alcohol consumption and drug abuse may cause necrosis of the femoral head, which may cause pain in the groin, buttocks, thigh root and other locations. It can be treated with oral medication such as warfarin sodium tablets under the guidance of a doctor, and in severe cases, it can be treated with surgery if it meets the indications for surgery. Thigh root lateral joint pain may also be caused by other reasons, such as acetabular fracture and hip joint synovial tuberculosis, etc., after rest still can not be relieved, it is recommended to consult a doctor in time, and follow the doctor’s instructions for treatment.