Sacroiliac joint hyperplasia and sclerosis are the results of orthopantomogram images of the pelvis, suggesting inflammatory changes in the sacroiliac joints. A common cause of inflammatory changes in the sacroiliac joints is ankylosing spondylitis. Ankylosing spondylitis lesion development usually starts from the sacroiliac joint, the sacroiliac joint manifests as osteophytes, the gradual occurrence of endochondral ossification, sacroiliac joint bone bridge formation sacroiliac joint ankylosis, accompanied by pain symptoms, pain often recurrent and progressive aggravation. Pain site in the lumbosacral region, accompanied by lumbar back stiffness and activity limitation, the treatment can choose diclofenac sodium, indomethacin, pau d’arco and other drugs for anti-inflammatory, analgesic symptomatic treatment, clinical use of the therapeutic effect of better.