Celiac disease, medically known as cervical columnar epithelial ectasia, is due to the cervical canal of the columnar epithelium by the hormone level of the impact of displacement to the external cervical opening, if it is simple cervical columnar epithelial ectasia, is physiological, do not have to deal with. Pathological displacement is common: 1, inflammatory stimulation of chronic cervicitis, vaginitis, pelvic inflammatory disease, long-term stimulation of the cervical columnar epithelium displacement, the need for treatment of the original disease. 2, multiple sexual partners, sexual uncleanliness is easy to cause HPV infection, which caused the displacement of the cervical columnar epithelium. 3, multiple abortions, the foetus and the foetus’s appendage discharged, the stimulation of the cervical mucosa will cause the squamous epithelium to be replaced by the columnar epithelium. 4, the cervical columnar epithelium displacement of the cervical columnar epithelium. Replacement of the squamous epithelium by the columnar epithelium.4. Multiple intravaginal or intrauterine surgeries, which stimulate the cervical mucosa to displace.