Anal fistula is a disease that mainly occurs in anal canal and rarely involves rectum. Anal pruritus, anal abscess, anal pain, purulent secretion and other symptoms will appear. Not many people know about this disease, and many patients miss the opportunity of early detection because they don't know what the symptoms are. Next, I will tell you what the symptoms of this disease are, so that everyone can do a good job of self-examination and achieve the goal of early detection and early treatment. The symptoms of anal fistula are: symptoms 1: sudden pain of anal fistula, mostly infection and inflammation, or poor drainage of pus, but it also indicates the spread of disease or the emergence of new lesions. The degree of pain is directly proportional to the disease, and the more severe the pain, the more serious the disease. Symptom 2: The external orifice is closed during the acute attack of mass inflammation, and the mass is enlarged when the drainage is not smooth. Symptom 3: The amount of pus is related to the size, length and quantity of fistula. The newly formed or acute inflammatory fistula is full of pus, smelly, yellow and sticky. Symptom 4: Anal pruritus: anal fistula infection and inflammation, pus dripping constantly, often wet and itchy around the anus. Even due to the long-term stimulation of secretions, perianal eczema and eczema complicated with infection make the condition worse and very painful. Symptom 5: When the anal fistula is serious, some patients discharge gas or feces from the anal fistula. After reading my introduction, I think everyone should understand the symptoms of this disease. If the symptoms mentioned above really appear, you should be alert, because this may be a precursor to this disease. What you have to do next is to go to the hospital for examination and treatment. If you are diagnosed, you should face it with a positive attitude. Such a disease can be cured by early treatment, so don't worry. So you should actively treat it. Finally, I wish the majority of patients a speedy recovery through treatment.