The main manifestations of gastrointestinal bleeding are hematemesis and melena, and a small amount of bleeding is not obvious. If there is a lot of bleeding, it may lead to shock, manifested as irritability or unconsciousness, pale face, cold limbs, difficulty breathing, blood pressure dropping to undetectable, pulse pressure difference narrowing, and rapid and weak pulse number. If not handled properly, it may lead to death. When there is moderate or massive bleeding in azotemia, fever can occur within 24 hours, mostly below 39 degrees, lasting for several days or even a week. The loss of vital organ function is also one of the main causes of death in patients with advanced gastric cancer. Due to the infiltration of cancer cells, the functions of major organs are affected. Even if some organs are not diseased, because human body functions are related, it will also lead to dysfunction.