Anal fistula is a common perianal disease along with hemorrhoids. The full name is anorectal fistula, which is a septic infection that occurs around the anorectum and collapses on its own or as a result of incision and drainage. Anal fistula is known as the “first killer” of the anus among benign diseases. In a small number of cases, fistulas can be disabling or even fatal. The risk of cancer increases significantly with a history of more than 10 years. Who is at risk of getting an anal fistula? Young adults between the ages of 20 and 40 are at high risk for anal fistula. The incidence of anal fistula is much higher in men than in women, with a male to female ratio of about 5:1. People in the north are more prone to anal fistula than people in the south, especially in the alpine zones of Inner Mongolia and Northeast China. This is due to the fact that people who live in high cold zones tend to prefer to drink alcohol to protect themselves from the cold and eat high calorie foods. In addition, foreigners are more likely to suffer from anal fistula than Chinese people. Data show that 3-5% of the population in China suffers from anal fistula. In contrast, the international incidence rate reaches 8%. How to prevent anal fistula? The actual fact is that you can find a lot of people who are not able to get a good deal on their own. The actual fact is that you will find a lot of people who are really busy with their work or because of the conditions, even if they have the intention, they will artificially tighten their anus until finally the intention disappears. If the cerebral cortex frequently inhibits defecation, on the one hand, the sensitivity of the rectum to feces is reduced, and on the other hand, feces stays too long in the rectum and sigmoid colon, water is excessively absorbed and dries out feces, resulting in stubborn constipation. In addition, because defecation is a complex, coordinated, time-conditioned reflex involving the cerebral cortex, it is important to develop the good habit of regular defecation and not to easily break your own rules, which is not only important for defecation, but also vital to maintain the stability of your “biological clock”.