The yellowish discharge around the anus is mainly caused by perianal disease, the specific reasons are divided into the following points: first, the anal fistula caused by increased perianal secretions, bacterial infection leads to the formation of a special fistula between the end of the rectum and the skin around the anus, so that pus and intestinal tissue fluid from the fistula exudes outside the anus, resulting in yellow mucus around the anus, and triggering the symptoms of malodor. The second is that the nucleus of the internal hemorrhoid prolapses. The second, the internal hemorrhoid nucleus prolapses with a lot of mucus resulting in increased secretions around the anus, the nucleus of the hemorrhoid will automatically return after prolapsing and there is no obvious pain symptoms, leaving only mucus or secretions around the anus. Thirdly, the anal sphincter is relaxed for various reasons, resulting in the anus not being able to close completely, causing involuntary leakage of tissue fluid from the intestine, which can cause leakage in serious cases.