The main reasons for the pain in the lateral thigh root position are twofold: 1, due to strains, strain and cold in the lateral thigh root muscles and muscle attachment points around the femoral trochanter, for example, when the hip joint is in abduction during strenuous exercise, there may be strains in the muscle tissues around the trochanter and the broad fascia muscles, once the strains produce a more obvious inflammatory The painful symptoms of this location are easily stimulated by edema and bruising, especially when the lesion is stimulated by activity, leading to further aggravation of the pain. 2, due to the location of the greater trochanter has bursitis, the bursa is a fat pad, which can cushion the collision and extrusion of muscle tissue or tendon and bone to play a cushioning role, but when subjected to significant stimulation, such as collision, cold and chronic inflammatory lesions, there is a risk that the bursa will be damaged. The inflammatory lesions may lead to the local formation of fat pad stimulation and inflammatory edema or ischemic state, but also easy to peripheral nerve stimulation and pain symptoms.