If a fistula is identified, it needs to be treated promptly. Anal fistula is a perianal disease that occurs at the end of the rectum, mainly due to acute purulent lesions at the end of the rectum due to bacterial infection. A special fistula is formed between the end of the rectum and the perianal skin, and a fistula opening appears in the perianal skin, which should be treated promptly even if there are no obvious symptoms. This is mainly because fistula symptoms, if they continue to worsen, can lead to cell necrosis or even deterioration, resulting in symptoms such as perianal malignancy. In addition, timely treatment is the best time to treat fistula symptoms when there are no obvious symptoms, even with conservative medication. The earlier you treat the symptoms of anal fistula, the better.