The symptoms of dying colon cancer patients mainly include systemic symptoms and local symptoms, as follows: 1. Systemic symptoms: severe anemia, extreme wasting of the whole body, and even cachexia are the most obvious. Before death, colon cancer patients will have severe anemia due to inability to eat, as well as tumor and bleeding. Patients will show pale skin and mucous membrane, shortness of breath, prolonged bed rest, and inability to move. Patients with anemic heart disease may be unable to lie down, sit and breathe, cough frequently, and produce large amounts of pink frothy sputum, which is a sign of acute heart failure. Patients also show extreme wasting and skin and bones, clinically known as cachexia, which is mainly caused by inability to eat and huge consumption of tumor. 2. Local symptoms: Local symptoms are divided into abdominal and metastatic organ symptoms, abdominal symptoms are mostly abdominal bulging, which is caused by large amount of abdominal fluid, and may also show bilateral lower limb edema. Patients usually have distant organ metastases, and those with liver metastases may show severe jaundice, hepatic coma and hepatic encephalopathy, and patients may become unconscious or even comatose and die soon from respiratory and circulatory failure. Pulmonary metastases, on the other hand, will show signs of respiratory failure and severe pneumonia, all of which are among the main causes of patient death.