The causes of pain in the lateral thigh are as follows: a. Bursitis of the greater trochanter: the painful area of this condition is often in the lateral thigh, near the pelvis, due to frequent inward activities of the thigh, such as stretched legs, or often sleep in the lateral position, can cause pressure on the greater trochanter bursa causing bursitis. Second, the lateral femoral muscle damage: mainly due to the usual excessive sports, or more than load muscle function exercise, can make the lateral femoral muscle damage, strain, so will be manifested as the pain of the lateral thigh. Peripheral nerve entrapment: for example, the anterolateral femoral cutaneous nerve is entrapped at the iliac crest, which often causes abnormal skin sensation in the anterolateral thigh, which can be manifested as skin numbness or local pain.