Inflammation, stenosis, and hemorrhage are thought to create an urgent medical situation in patients with digestive cancer. Peritonitis originating in perforation or penetration and intra-abdominal abscess are inflammations due to cancer. An urgent operation is necessary for patients with panperitonitis. In a patient with localized peritinitis and intra-abdominal abscess, primarily conservative therapy using antibiotics and immunoglobulin is tried, but surgical or stabbing drainage is necessary when symptoms take a turn for the worse. Bougienage, insertion of prosthesis, and detention of expandable metallic stent are considered conservative therapy for stenosis due to cancer. Surgical resection of tumor or bypass operation is applied as surgical therapy for stenosis due to cancer. Blood transfusion, endoscopic hemostasis, and transcatheter arterial embolization are considered conservative therapy for hemorrhage due to cancer, while surgical hemostasis and resection of tumor are used as surgical therapy for hemorrhage due to cancer. In any case, surgical therapy is timely and necessary when symptoms take a turn for the worse in spite of conservative therapy for urgent medical treatment of patients with digestive cancer.