Pain in half of the buttock bone may be caused by trauma, lumbar disc herniation, femoral head necrosis and so on. 1. Trauma: some teenage patients may cause muscle tear or injury when they exercise strenuously, and the symptom of pain in half of the buttock bone occurs. 2. Lumbar disc herniation: when the patient has lumbar disc herniation, the nerve root is irritated and compressed, and the pain is mainly radiating, and the symptom of pain in half of the buttock bone may appear. 3. Necrosis of the femoral head: one of the typical symptoms of necrosis of the femoral head is pain in the hip joint, and the pain is mainly concentrated in the two sides of the thigh root. Mainly manifested as after exercise, long time standing or walking, the pain is aggravated. Clinical osteoarthritis, pyriformis syndrome, etc. can also cause the phenomenon of half of the hip bone pain, the patient should consult the doctor in time, clarify the cause of the disease, choose targeted treatment.