Thumping of hip joint can be caused by osteoarthritis of hip joint, acetabular labral injury and other reasons. 1. Osteoarthritis of the hip joint: osteoarthritis of the hip joint can occur in the elderly, when the hip joint activities can occur, such as thumping and other abnormal sound manifestations, in addition to pain and activity limitation and other manifestations, need to carry out X-ray and magnetic resonance imaging and other tests for further diagnosis. 2. Acetabular labral injury: due to trauma and other direct violence can lead to acetabular labral tear, when the activities can cause hip joint rattling, local pain and other symptoms, after resting the pain symptoms can be relieved by MRI examination can help to clarify the degree of damage to the acetabular labrum. When there are symptoms such as thumping of hip joints, you should consult a doctor in time and take X-ray and MRI examination, so that the specialist can make a clear diagnosis and provide appropriate treatment, which will help you recover early.