The large crotch axis “lack of oil” is the common name of the people, and medically we call it “popping hip”. It means that when walking, or active flexion and extension of the hip joint, or for the hip joint internal rotation can be heard or felt at the joint popping sound. The main symptoms are stiffness, soreness or pain in the outer thigh, nodularity or striated positive reactions can be palpated, and pressure pain is obvious. Self massage can relieve pain, recommend a few tricks to everyone 1, palm kneading method: side lying, the affected side on the top, flexing the hip and knee, with the palm root from the top down from the hip muscle thick, through the greater trochanter of the femur until the small head of the fibula, slightly hard to press for 10 minutes, until the subcutaneous warm feeling for degree. 2.Knock method: In the same position as above, hold an empty fist in your hand and knock on the painful points and strips to the extent that you can tolerate them, with Yu points such as Huanjiao, Jusuo, Fengshi, Aye and Yanglingquan as the main points. 3, smooth method: the same position as above, with the palm root as the focus point, slowly and forcefully, from the hip muscle thick place to start through the wind, A is point to the fibula head under the Yanglingquan, repeated 5 to 10 times. Warm tips: 1, the technique should be moderate force, do not use brute force 2, when the pain is heavy, promptly go to the hospital for examination to exclude other evidence 3, usually standing should not last more than 2 hours, avoid strain, rest at the appropriate time