Pus in bowel movement after polyp surgery, consider gastric polyps or intestinal polyps after surgery, the surgical wound may appear necrosis, ulceration and other changes, it is recommended to review the diagnosis of the cause of the cause before treatment. Common polyp lesions include gallbladder polyps, stomach polyps, intestinal polyps, and cervical polyps. Stomach polyps and intestinal polyps are the most common lesions that can cause abnormal bowel movements after polyp surgery. Surgical procedures for gastric and intestinal polyps include gastroscopy, enteroscopic polypectomy and open surgery. Due to the maturity of endoscopic techniques, most of the cases are minimally invasive. Polyps are removed by electrocoagulation cauterization, ligation, and excision. After surgery, there may be ischemia, necrosis, ulceration and other changes in the traumatic tissue, resulting in pus in the bowel, which should be promptly consulted, complete the examination, and follow the doctor’s instructions to treat accordingly after a clear diagnosis.