The pain on the upper side of the left hip bone refers to the pain on the upper part of the left hip, and the possible causes are exertion, trauma, ankylosing spondylitis, kidney stones, etc. 1. Exhaustion: due to long time bending, strenuous exercise, the body is overworked, lactic acid accumulation, the left hip pain can occur, which is a normal phenomenon, you can rest appropriately. 2. Trauma: because of the role of external forces caused by the skin around the left hip, subcutaneous tissue damage or even hip bone and pelvic fracture, thus causing pain. 3. Ankylosing spondylitis: due to the repeated stimulation of inflammation, connective tissue fibrosis joint stiffness, can appear in the hip joint, spine pain, stiffness, difficulty in movement. 4. Kidney stones: due to the blockage of the ureter by stones, causing damage to the lining of the ureter, inflammatory reaction, can appear on the left hip pain pain, pain is mostly colicky, more intense. Causes of pain in the upper left hip are more reasons, may also be related to nephritis, pyriformis syndrome, femoral head necrosis and other diseases, if the symptoms continue to be unrelieved, it is recommended to consult a doctor in time, to clarify the cause of the disease, and targeted treatment.