Sleeping on one side and pressing the hip bone axis hurts, which may be caused by inflammation of the hip joint or necrosis of the femoral head. Hip joint inflammation is a kind of osteoarthritic disease with degeneration of hip joint cartilage or change of bone structure, which may be related to obesity leading to increased weight bearing on the hip joint and unbalanced weight bearing on the hip joint surface for a long period of time. It can cause hip stiffness, pain, limited activities and other symptoms, and increased pain when sleeping on the side due to compression of the joint. Necrosis of the femoral head is a disease caused by ischemia of the femoral head, which results in the death of cells and bone marrow components of the femoral head, necrosis of tissues, and structural changes and collapse of the femoral head. It can cause pain and dysfunction of the hip joint, and the pain can radiate to the ipsilateral hip or knee joint. Sleeping on one’s side and pressing on the hip bone shaft may affect the quality of daily life, and it is necessary to go to the hospital in time to seek medical treatment and make a clear diagnosis, so as to avoid other adverse consequences.