There are several reasons for the fishy smell in the anus: one, it is caused by hemorrhoids, external hemorrhoids can lead to poorly closed anus, thus the fecal water in the rectum will leak out to the perianal area causing a foul smell, there are also serious internal hemorrhoids when prolonged prolapse outside the anus, it will also lead to fecal water in the rectum leaking out to the outside of the anus, causing a foul smell. If you have external hemorrhoids, you should pay attention to a light diet, eat a lot of vegetables and fruits, keep your bowels open, and pay attention to the cleanliness of your anus after the bowel movement. If you’re a serious internal hemorrhoid, you’ll need surgery to control the symptoms. The first thing you need to do is to get a good idea of what you are getting into. In the case of severe anal fistulas, there may be fecal water and gas leaking from the external opening of the fistula, resulting in an odor around the anus. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things.