Spondylitis is a serious condition because it is an autoimmune disease that causes erosion of the spine, resulting in significant pain and limited movement. In some patients, the spine is flexed in order to relieve pain, which can easily lead to hunchback deformity after a long period of time, and some patients may have a ninety-degree hunchback deformity, which affects the patient’s ability to see normally. Therefore, spondylitis is a serious autoimmune disease and must be treated in a timely manner once it appears.