Left hip pain can be caused by gluteal fasciitis, gluteal cutaneous nerve entrapment, pyriformis syndrome, sciatic tuberosity bursitis and other causes. 1. Gluteal fasciitis: gluteal myofasciitis can cause localized aseptic inflammation of the gluteal muscles, which can be stimulated by overwork or cold, leading to pain in the left hip. 2. Gluteal cutaneous nerve entrapment: gluteal cutaneous nerve entrapment can trigger cutaneous neuritis, which can cause pain in the left gluteal part of the cutaneous nerve innervation area. 3. Piriformis syndrome: when the sciatic nerve is compressed in the area of piriformis muscle of the buttock, it can cause buttock pain and radiating pain in the lower limbs, which can be manifested as pain in the left side of the buttock. 4. Sciatic tuberosity bursitis: prolonged exercise and exertion or local cold can lead to chronic bursal inflammation at the sciatic tuberosity, and the stimulation of inflammation can cause local bone pain symptoms. When the left side of the hip pain, the patient should promptly seek medical attention, clear causes for standardized treatment, so as not to delay the condition.