Symptoms of terminal cancer three days before death cannot be clearly defined, but the symptoms before death should be determined according to the type and location of cancer, and clinically most of them are mainly systemic and local symptoms such as consciousness disorder, edema, pain and so on. 1. Systemic symptoms, as the metastasis and spread of cancer cells in the advanced stage, the nutritional intake of patients will be affected, resulting in generalized weakness, anemia, generalized edema, impaired consciousness, etc., and in serious cases, it may even lead to shock and coma, and inability to eat. 2. Localized pain, the cancer cells constantly cause damage to bones and soft tissues, resulting in local or even generalized severe pain, which can be treated with pain-relieving drugs. 3. Secondary infection, as the immunity and resistance of the body are lower in the late stage of cancer, it is easy to get infected and cause fever, suppuration and other manifestations.