It is very common to have secretions from the incision after anal fistula surgery, mainly because: 1) the tissue fluid exuding from the incision; 2) the secretions will increase when the incision tissue is not fresh or infected; 3) the secretion of anal fluid and a small amount of overflowing intestinal fluid and fecal water mixed together, partly from the anal glands. The anal fistula surgery has an incision, which leads to the anus, and when the incision has a certain depth, the anus is often not closed properly because of the incision, so the anal fluid and intestinal fluid and fecal water will overflow through the incision. Don’t worry about this situation, as the incision slowly heals, the exudation will gradually decrease and disappear. In rare cases, even if it does not disappear completely, it can be cleaned in time and is usually not a big problem. So when you encounter exudate, you should clean and clean it in time, or get a doctor to change the medication in time. Once the necrotic tissue of the incision is cleaned, the exudate of the incision will often be reduced, or as the granulation tissue of the incision becomes fresh, the exudate of the incision will also be gradually reduced.