Three months after anal fistula surgery there is blood, accompanied by stabbing pain, consider the wound localized infection, or local formation of hematoma. 1. Infection after anal fistula surgery: three months after anal fistula surgery, there is still blood, first of all, to determine whether the secretion is due to infection, wound healing after anal fistula surgery generally takes about a month, in the anus around the gradual formation of scar tissue, pay attention to the observation of the bleeding site whether there is redness and swelling and other problems, consider the infection situation. After the surgery there is an infection, it is recommended to use the method of cleaning, clean up the local secretions, pay attention to the use of iodine povine for wiping cleaning, while using warm water sitz bath every night. 2. Local hematoma formation: pay attention to observe whether there is a hematoma problem, it is recommended to carry out anoscopy and treatment if necessary, pay attention to purulent secretions can be drained. The first thing you need to do is to look for the inner mouth, complex anal fistula, need to hang the line surgery, after the surgery must adhere to the change of medicine, to avoid the formation of local infections, it is recommended to consult with the regular hospital anorectal department.