Bleeding from sitz baths after anal fistula surgery is mainly caused by bleeding from the anal fistula surgical wound. Anal fistula surgery is generally deeper surgical wounds, so there will be bleeding in the early stage of the wound. If you take the anal fistula incision, bleeding is a normal phenomenon, when the sitz bath, due to the larger surgical trauma factors are prone to trauma bleeding will occur after the sitz bath. In addition, due to the anal fistula surgery wound in the anus, the wound is easy to be contaminated by feces resulting in slow growth of granulation tissue, so sitz bath after stool can promote wound healing and clean anal fistula surgery wounds, but after the sitz bath is easy to lead to the bleeding of the granulation tissue wound. With the gradual healing of the wound after anal fistula surgery, the bleeding situation will gradually improve later sitz bath. Therefore, bleeding phenomenon, do not worry too much, in the examination and change of medicine can consult the attending physician, understand the condition, to dispel doubts.