Three months after the anal fistula surgery or swelling can generally be relieved and controlled by drugs and nursing treatment, three months after the anal fistula surgery or swelling is generally due to bacterial infection. 1. medication: three months after anal fistula surgery or swelling is generally due to inflammation caused by stimulation, the patient can use medication under the guidance of the doctor sitz bath treatment, such as diluted potassium permanganate, benzalkonium chloride solution, etc., this kind of drug has a disinfectant and antibacterial effect, allergic to this kind of drug patients are prohibited. You can also apply mupirocin ointment and erythromycin ointment locally for anti-infection treatment. 2. Nursing treatment: three months after the anal fistula surgery or swelling, the patient can also relieve pain by lifting the anus movement, usually pay attention to keep the bowels open, eat more vegetables and fruits, avoid violent defecation, and wash the anus with lukewarm water every night. Patients with anal fistula surgery, anal swelling, poor healing and other conditions, it is recommended to go to the hospital regularly to review, with the doctor for related treatment, to avoid delaying the condition.