Vaginitis generally does not cause anal distension, if vaginitis is serious can lead to pelvic inflammatory disease, and then it will trigger anal distension; anal distension is mostly related to anal and intestinal diseases, such as hemorrhoids, perianal abscess and so on. Vaginitis is mainly manifested as abnormal vaginal discharge, pain, itching, odor, etc.; serious cases may be complicated by urethritis, pelvic inflammatory disease, and some related manifestations, especially pelvic inflammatory disease caused by congestion and edema compression of the rectum, thus causing anal distension. Anal distension is very often caused by anorectal diseases, such as hemorrhoids, anal abscess, anal fistula, rectal polyps, proctitis, etc., should go to the anorectal department in time, and standardized examination, in order to clarify the specific causes. Anal distension must be taken seriously, can not ignore the condition, timely medical diagnosis clear, to avoid further aggravation of the condition, endangering the health of the body.