Lifting your leg and your hip will thump is hip popping. There are many reasons, the common ones are soft tissue proliferation contracture, hip arthritis and hip dislocation. 1. Soft tissue hyperplasia contracture: due to long-term muscle injections in the gluteus maximus area, resulting in local muscle tissue contracture to form a scar structure. When lifting the leg, the proliferated scar tissue can slide on the greater trochanter of the femur, resulting in hip popping. 2. Hip arthritis: due to trauma or strain injury, the local surrounding tissues become congested and edematous, resulting in aseptic inflammation, leading to hip arthritis, which can be accompanied by joint popping when lifting the leg. 3. Hip dislocation: the joint between the femur and the pelvis loses its normal position and becomes dislocated, and joint popping may occur, accompanied by hip pain, shortening of the lower limbs, deformity and other symptoms. Hip popping may also have other causes, such as labral injury, etc. If the hip pops for a long time, you should go to the hospital in time, improve the examination to clarify the cause of the disease and standardize the treatment.