Hemorrhoids with localized moisture and a feeling of falling, may be caused by simple hemorrhoids or with rectal polyp prolapse, pelvic rectal hiatus abscess with hemorrhoids and other reasons. 1. hemorrhoids: such as mixed hemorrhoids, due to the formation of external hemorrhoids can cause anal discomfort, moist uncleanliness, itching and other manifestations, and in defecation, there is an internal hemorrhoid prolapse or standing for a long time, coughing, weight-bearing causes hemorrhoids prolapse out of the anus, stimulation of the dentate line area, caused by localized swelling sensation. 2. Prolapse of rectal polyp: at the beginning, it can be prolapsed during defecation, and can be reset by itself after defecation, but with the aggravation of prolapse, it can cause anal incontinence, mucus outflow, perianal moisture, itching, and the swelling can be accompanied with defecation incompletion and a feeling of falling down after prolapse. 3. Pelvic rectal hiatus abscess: local manifestations of rectal swelling, incomplete bowel movement, bowel discomfort can be accompanied by difficulty in urination, accompanied by external hemorrhoids, there can be perianal moisture. When the anus appears hemorrhoids, dampness and falling feeling performance, need to timely to the hospital specialist medical care, clear cause, cause and symptomatic treatment.