The correct term for hip bone should be hip bone. The possible causes of lumbar combined hip pain are: trauma, lumbar disc herniation, lumbar spinal stenosis, ankylosing spondylitis and so on. 1. Trauma: patients with violent blows to the lumbar or hip area or a recent history of fall injuries can experience pain in the lumbar and hip area, patients usually have a clear history of trauma, and local soft tissue swelling, ecchymosis and other manifestations can be found during physical examination. 2. Lumbar disc herniation: Lumbar disc herniation is a degenerative disease of lumbar vertebrae, which can cause lumbar pain and radiating pain in the nerves of the lower limbs, mostly radiating along the buttocks and lateral thighs to the distal end, accompanied by abnormal sensation in the lower limbs and muscle weakness. 3. Lumbar spinal stenosis: Lumbar spinal stenosis refers to the narrowing of lumbar spinal canal, nerve root canal, intervertebral foramen and other parts of lumbar spinal canal caused by any reasons other than independent diseases, which results in the compression of the nerve root or cauda equina nerve and causes corresponding symptoms, and the patient’s main manifestation is long-term lumbar pain, and then develops into lower limb pain with muscle weakness. Typical performance is neurogenic intermittent claudication. 4. Ankylosing spondylitis: Ankylosing spondylitis is a kind of autoimmune related spinal arthritis, mostly started by the sacroiliac joints, the patient’s initial manifestation of lumbosacral discomfort, acidity, pain, etc., and then can gradually spread downward to cause inflammation of the hip joints or even the knee joints, which is manifested as pain around the hip joints. In the late stage, it can cause serious hunchback deformity. It is recommended to go to the hospital as soon as possible to get a clear diagnosis and targeted treatment after the emergence of lumbar and hip pain.