Hip abduction and external rotation with popping sound, consider hip arthritis, hip dislocation and other factors. 1. Hip arthritis: Hip arthritis is a degenerative disease of the joints, cold, chronic strain can lead to the hip joint part of the tissue congestion and edema, the joint space narrows, then in the abduction of external rotation, due to the friction between the joints can appear popping. 2. Hip dislocation: most of them are related to violence and trauma, because the position of the hip joint has changed, there will be symptoms of restricted activities, in addition, when performing abduction and external rotation, due to the friction between the joints will also cause popping sound. Hip abduction and external rotation with snapping sound, it is recommended to go to the hospital in time for examination, to clarify the cause of the disease for standardized treatment, usually pay attention to rest, avoid excessive weight bearing on the hip joint.