Because the anus is the exit of defecation, there will be a small amount of secretion discharge, especially with hemorrhoids, prolapse and other symptoms will appear mild incontinence, digestive juices or secretions constantly discharge, after washing the anus will also have a bad smell is a normal phenomenon. The most important thing is to pay attention to the cleanliness around the anus and take a warm bath every day, especially after defecation. When there is inflammation around the anus or intestines, the symptoms of anal odor can appear, along with local redness, pain, and increased secretions, which can be treated with oral or topical anti-inflammatory drugs and frequent washing with warm water. If you feel uncomfortable, try to go to a regular hospital and get treatment after diagnosis.