The clinical symptoms of internal hemorrhoids are numerous, and surgery is only recommended if the internal hemorrhoids frequently recur, or if the clinical symptoms are severe. Severe internal hemorrhoids are primarily characterized by substantial rectal bleeding or recurrent prolapses, and due to repeated prolapses, friction on the local mucosa may even cause anal pain. A severe symptom of prolapsed internal hemorrhoids is that after each prolapse, the patient needs to manually reposition them, accompanied by jet-like or dripping fresh red rectal bleeding. Surgical methods for internal hemorrhoids mainly include hemorrhoidectomy with ligation or local injection of sclerosing agents.