The symptom of anal oil is a misunderstanding of anal diseases. Anal dampness may be caused by anal eczema or by the outflow of fluid from the intestine due to anal flaccidity. Anal laxity is a common disease, mostly seen in the elderly and children, as follows: 1. children: by the development of the whole body does not reach a good level, resulting in anal muscle laxity, there is a large amount of intestinal fluid in the rectum, which may flow out along the lax anus; 2. elderly people: due to the posterior anal sphincter laxity or have large and small incontinence, easy to cause intestinal fluid outward, children will improve in adulthood or Strengthen the anal sphincter training and do more anal lifting exercises; 3. Adults: If similar symptoms occur, surgical treatment is needed to contract the anus by tightening the anal sphincter.