Men’s left back to hip pain can have the following reasons: first, gluteal fasciitis, gluteal fasciitis patients can have pain in the gluteal fascia, often due to cold, exertion, which should be early checkups and inspections, to exclude other diseases to diagnose. Second, gluteal cutaneous neuritis, gluteal cutaneous neuritis can often have pain in the upper part of the buttocks, a palm size cutaneous nerve pain, which should be early checkup, early nutritional nerve and physical therapy. Third, sacroiliac joint disease, when the sacroiliac joint has sacroiliac arthritis or dense osteoarthritis, there can also be symptoms of pain between the waist and the buttocks, then we should check the sacroiliac joint CT, X-ray to diagnose at an early stage. Fourth, rheumatoid or ankylosing spondylitis and the involvement of the sacroiliac joint pain, this time to check the sacroiliac joints, lumbar spine X-ray film and blood tests to diagnose and early treatment.