The baby’s perianal abscess is well with a hard knot and pus may be the emergence of anal fistula, can take the blockage method of treatment or surgical treatment. Fistula is rarely self-healing, once diagnosed should be timely treatment. When there is only one fistula, you can take the plug method of treatment, that is, with metronidazole, saline rinse fistula, with bioprotein gel injected from the external mouth, non-invasive and painless treatment of anal fistula, but the cure rate is low. When the location of the anal fistula is low, it can be treated with fistulotomy, and the wound is healed by granulation tissue in the second stage. When the anal fistula is higher or more complex, it is usually treated with hanging wire therapy, which is more effective. Baby perianal abscess and then pus should be timely to the regular hospital, under the guidance of professional physicians to choose the appropriate treatment.