Thigh root with buttock tendon pain, may be due to exercise intensity, joint disease and femoral head necrosis and other reasons. 1. Higher intensity of exercise: If the patient performs higher intensity of exercise, it may lead to spasm of the buttock muscles, which may cause the thigh and buttock tendons to hurt. Usually, after the lactic acid level drops for a period of time, the pain symptoms can be relieved. 2. Joint diseases: If the patient has joint diseases such as hip joint labral injury, it may lead to pain in the relevant parts, and should go to the hospital in time for examination to determine the type of disease. 3. Necrosis of the femoral head: patients suffering from necrosis of the femoral head will show symptoms of pain in the lateral hip tendons at an early stage, and should go to the hospital for treatment in time. If the thigh root connected with the buttock tendon pain, may also be due to cramps and other reasons, should go to the hospital in time for examination and treatment.