Wound epidermal ulcers two months after anal fistula surgery may be caused by a variety of factors such as perianal abscess, infection, local mucus irritation, and other factors, the specifics should be further to the hospital. 1. Perianal abscess: may be due to perianal abscess gradually formed anal fistula, the lack of blood circulation in the perianal tissues after surgery, and then appeared two months after anal fistula surgery wound epidermal ulcers. 2. Infection: may be due to postoperative wound care not pay attention to wound infection, and then appear wound epidermal ulcers. 3. local mucus stimulation: generally in the postoperative wound and rectal connection, each time in the stool or rectal secretion of mucus, it is easy to stimulate the wound of anal fistula, thus causing the wound epidermal ulcers, you can follow the doctor’s instructions to use 1:5000 potassium permanganate solution sitz bath or apply erythromycin ointment and other medications for treatment. Two months after the anal fistula surgery wound skin ulcers, may also be other reasons, please go to the hospital in a timely manner, a clear diagnosis in order to avoid delaying the condition. Usually need to pay attention to the wound clean disinfection, so as not to cause secondary infection.