Ligation of internal hemorrhoids usually does not have pus outflow, if there is pus outflow, most consider that there is an infection, need to do further examination to clarify the situation. Internal hemorrhoid ligation will not flow pus, because the main clinical symptoms of internal hemorrhoids is painless blood in the stool and after the stool has anal swelling prolapse, this kind of prolapse of the swelling can be self-returned to the anus, the serious need for surgical ligation. If there is pus, most of the consideration is the perianal infectious pus caused by the current clinical most common is anal fistula and perianal abscess, when there is pus symptoms, most likely to have perianal abscess or anal fistula, should not be considered to be caused by internal hemorrhoids. You need to go to the hospital for specialized examination to clarify the cause and treatment. It is recommended that after the internal hemorrhoid ligation, the phenomenon of pus flow, once found, as soon as possible to give diagnosis and treatment, to avoid delaying the aggravation of the condition.