The hip bone, or hip bone. Hip bone pain in the elderly may be related to trauma, osteoporosis, lumbar spine disease, arthritis, femoral head necrosis and other reasons. 1. Trauma: such as acute sprain or fracture dislocation of the hip joint, etc., can cause pain in the hip bone, and is accompanied by limitation of hip activities. 2. Osteoporosis: the loss of bone calcium is serious in the elderly, due to the decline in the carrying capacity of the bones, which can lead to bone pain in all parts of the body, especially in the load-bearing bones, such as the hip bone, femur and so on. 3. Lumbar spine disease: Lumbar disc herniation caused by degenerative changes in the spine can be manifested as pain in the hip bone and surrounding areas. 4. Arthritis: including rheumatoid arthritis and osteoarthritis caused by long-term strain, manifested by pain and swelling in and around the hip bone, rheumatoid arthritis can also be accompanied by morning stiffness. 5. Necrosis of femoral head: ischemia of femoral head leads to interruption of joint nutrition and destruction of structure. Hip pain is the most common clinical manifestation. Hip pain, especially in the elderly, should be highly valued. As soon as it is detected, it should be treated immediately and the cause of the disease should be clarified.