Definition of perianal abscess Perianal abscess is called perianal abscess, which is an acute purulent infection that occurs around the anorectum and is a bacterial infection, a predecessor of anal fistula, and anal fistula essentially belongs to two stages of one disease. The prevalence of perianal abscess is mostly seen in men aged 20-40 years, with the incidence in men being 3-4 times higher than that in women, and the incidence in infants and children is also relatively high. This may be related to the level of androgens in the body. The majority of perianal abscesses are caused by infection of the anal sinus and anal glands, which is the gap left at the connection between the rectum and the anal canal, with the opening upwards and the opening of the anal glands inside. Dysbiosis of the intestinal flora destroying the local barrier and low immunity are also causes of perianal abscess, such as staying up late and drinking a lot of alcohol. There is also a part due to foreign body loss and loss of medical origin. Symptoms of perianal abscess The main symptom of perianal abscess is pain, and this pain is very intense, which is aggravated by coughing and sneezing, and is accompanied by localized swelling, and some patients also have fever or even hyperthermia. What tests are needed for perianal abscess 1. routine anal examination: to see the local redness and scope, and to feel the size of the location; 2. routine blood test to determine the degree of infection; 3. ultrasound examination, which is now widely used; 4. CT and and MRI are mainly used for high abscesses that cannot be seen or felt. 5. local penetration, if purulent fluid can be extracted, can confirm the diagnosis. Will perianal abscess heal by itself Perianal abscess cannot heal by itself because the infection of perianal abscess is mostly caused by the infection of anal sinus and anal gland, and the origin is inside the intestine, which is different from the surface abscess elsewhere in the body, and perianal abscess mostly needs to find the right internal opening and drainage to heal. The perianal abscess is the predecessor of the fistula, which is the acute stage, and the fistula is the chronic stage of the perianal abscess, so if the perianal abscess is not treated in time, the fistula will be formed after it breaks down. The staged surgery of perianal abscess is to first incise and drain to form an anal fistula and then perform the second stage surgery.