After the removal of gastrointestinal polyps may cause sequelae due to surgical operation, such as perforation and traumatic bleeding after the removal of gastrointestinal polyps. 1. Intestinal polypectomy: Intestinal bleeding and intestinal perforation are the most common sequelae. Any invasive operation may lead to bleeding and symptoms such as blood in stool and black stool. Some patients have large intestinal polyps with deep base, if the operation is not skillful, it will easily lead to intestinal perforation and cause serious complications. 2. Gastric polypectomy: Gastroscopy of polyps is usually performed through a gastroscope, which enters the gastric cavity from the esophagus and expands the gastric cavity with gas to facilitate observation and operation. After determining the location of the polyp, the operation is performed according to the size and depth of the polyp. After the surgery, the polyp will have a wound. The larger its wound, the higher the chance of perforation and bleeding. After the removal of gastrointestinal polyps, symptoms such as severe abdominal pain, bloody stools and bleeding must be reported to the doctor in time, so that proper judgment can be made and treatment can be given as soon as possible to avoid aggravation of the condition.