There are many reasons why one side of hip bone hurts when walking, such as hip joint trauma, hip arthritis, ischemic necrosis of femoral head, osteoporosis and so on. 1. Hip joint trauma: external trauma to the hip joint, such as falling and landing on the hip, may lead to femoral neck fracture, so there will be a side of the hip bone when walking pain phenomenon. 2. Hip arthritis: Hip arthritis can also cause the phenomenon of hip pain when walking, such as rheumatoid arthritis, rheumatoid arthritis, osteoarthritis and so on. 3. Ischemic necrosis of femoral head: Ischemic necrosis of femoral head is usually caused by trauma, long-term alcohol consumption and application of hormonal drugs. 4. Osteoporosis: middle-aged and old people may be due to degenerative changes caused by osteoporosis, alternating side of the hip bone pain. There are many reasons why one side of the hip bone hurts when you walk, after the symptoms, we suggest that we go to the hospital in time to improve the examination, and take standardized treatment according to the doctor’s instructions, and do not ignore the symptoms and take them lightly.