The latest survey data shows that more than 50% of people suffer from anal diseases, that is, one in two people have “export problems”. The most recent survey data shows that more than 50% of people suffer from anal diseases, which means that one in two people have “exit problems”. The predecessor of anal fistula is perianal abscess Anal fistula is not an acute disease, it has a chronic process of evolution. Initially, you will notice a hard lump at the entrance of the anus that you can feel with your hand. This lump gradually grows to form an anal abscess, which is a little painful. After the abscess breaks down, the pus inside flows out and suddenly the pain is gone. However, this does not mean that the disease is cured. After that, pus will appear again and again near the anus, repeatedly swelling, breaking, and flowing …… in a non-stop cycle. At this time, an anal fistula is formed from an anal abscess. If you just feel a lump at the anal opening, it could be a thrombosed external hemorrhoid or it could be an anal fistula. This is something that ordinary people cannot accurately determine on their own. Therefore, once you feel something growing in your anus, it is recommended to go to the hospital as soon as possible for an examination. The actual fact is that you will be able to get a lot more than just a few of the most popular and most popular items. If a low anal fistula breaks down, the pus inside will flow out of the anus by gravity. The actual fact is that if you find pus in the anal opening, you may have an anal fistula. So, what does this pus look like? It may be yellow, it may be thin and almost transparent, and it may have pus and blood. This is because once the external opening of the fistula breaks, it can bleed. In some patients, there is no pus, only bleeding. These are the external manifestations of a low anal fistula. If you can’t find the cause of the fever, it may be a high anal fistula If the location of the long anal fistula is high in the intestine, it is not easy to ulcerate; as the condition progresses over time, the inflammation may develop not downward, but upward, forming an abscess. In this case, there is no hard packet to feel at the anal opening and no other external signs, causing the condition to be more hidden and more dangerous. If it is not detected for a long time, it is easy to form sepsis or even septicemia. When the pus from the inflammation develops in the rectum and the surrounding spaces, the spaces around the intestines become “swollen” and then cause systemic symptoms such as fever. This kind of pus and blood, if formed rectal fistula, repeated onset, will eventually cause rectal stricture, making the condition more complicated and difficult to treat. This is not a common phenomenon, but it does exist, so please be vigilant. I once encountered a case like this. The patient had a fever of more than 40 degrees for many days, and the cause could not be identified despite the use of MRI and other tests. It was found to be an anal fistula. The deeper the location of the abscess, the more severe the fever, and the more difficult it was to determine because no changes could be seen in the appearance. In fact, it is all pus inside, and when you experience it carefully, you will feel a strong downward sensation. Once the abscess develops to the mucosal location, since the painful nerves there are not very rich, it is only possible to feel the downward fall. And the further down the abscess is located, the more painful it becomes, and the harder bumps can be felt, making it easier to diagnose. What kind of people are prone to get anal fistula? 1, more foreigners than Chinese data show that the population suffering from anal fistula in China accounts for 3-5% of the total population. And the international incidence rate reaches 8%. 2, more people in the north than in the south people in high cold areas are prone to anal fistula in the clinical process over the years, we found that a large proportion of people living in high cold areas such as Inner Mongolia and the northeast of China suffer from anal fistula; and fewer cases in the south. This may be due to the fact that people living in high cold zones prefer to drink alcohol and eat high-calorie food in order to protect themselves from the cold, plus the high indoor temperature in winter, with heaters or even fire beds and the like …… external hot and dry environment, and internal high-calorie food nutrition combined to form. 3, young adults in the male more from the anorectal patients can be seen, 20-40 years old young adults is the high incidence of anal fistula population. The incidence of men is much higher than that of women, with a male to female ratio of about 5:1.