Pus flow after perianal abscess surgery, may be the drainage of the pus cavity is not good or complication of anal fistula. 1. After the operation of perianal abscess, the contraction of anal or anal sphincter muscle hinders the drainage and emptying of pus, which makes it prolonged and continuous pus, so it is necessary to expand the incision to drain the pus, to empty it, and to keep the drainage smooth. In addition to preventing infection, timely cleaning and sitz bath after bowel movement, but also in the pus cavity directly filled with antibacterial gauze, the effect is better. 2. Perianal abscess will often cause anal fistula, a chronic granulomatous lesion, with external pus, mucus secretion, recurrent episodes, accompanied by pain, redness and swelling. Anti-infective treatment and surgery are required. Anti-infective drugs such as ceftazidime and metronidazole are often taken. Surgery is often used according to the type of anal fistula fistulotomy, fistulotomy, hanging line therapy, the treatment effect is better. Perianal abscess pus after surgery, it is recommended to give diagnosis and treatment as soon as possible, to avoid the condition of prolonged, affecting the normal function of the body; it should also be noted that the use of drugs should be determined before the use of drugs to determine whether there is an allergic reaction, to be under the guidance of the doctor’s treatment and medication.