A little soreness above the left hip can be caused by the following reasons: first, gluteal myofasciitis, patients with gluteal myofasciitis can have symptoms of soreness in the fascia above the hip on one side, especially when they get cold or are tired, and the symptoms of soreness are very obvious. Second, sacroiliac joint diseases, when the sacroiliac joint has inflammation or dense osteitis, there can be pain in the sacroiliac joint above the hip, then we should check the x-ray and CT of the sacroiliac joint to diagnose. Third, rheumatoid and ankylosing spondylitis, rheumatoid and ankylosing spondylitis can involve the sacroiliac joint above the hip, there can be symptoms of pain in the sacroiliac joint, then we should check the x-ray of the sacroiliac joint, x-ray of the lumbar spine and blood tests for early diagnosis and early treatment.