Intermittent blood in stool for 3 years without pain was considered as internal hemorrhoids. Pathological changes in the anal cushion lead to congestion, hyperplasia and hypertrophy of the anal cushion to form internal hemorrhoids, located above the dentate line. Clinical manifestations are painless intermittent fresh blood after defecation, long-term bleeding can lead to iron deficiency anemia. The diagnosis mainly relies on anorectal examination. In the early stage of internal hemorrhoids, only general treatment is needed, eat more fibrous food, change bad bowel habits, and keep the bowel clear. Hot water sitz bath can be used to improve local blood circulation. If the internal hemorrhoids prolapse outside the anus, injection therapy, rubber band ligation and other methods of treatment, if necessary, hemorrhoidectomy. When you find intermittent painless blood in stool, you should go to the hospital in time and follow the doctor’s instructions for treatment.