Sudden illness is a disease that occurs suddenly and without prior anticipation, or a sudden enhancement of a primary disease based on the original primary disease, after some major blow or severe trauma, or a catastrophic injury caused by an accident under abnormal circumstances, are all called sudden illnesses. Common sudden illnesses include acute poisoning, such as gas poisoning, food poisoning, and drug poisoning are all sudden illnesses. Sudden cardiovascular diseases, such as acute cerebral infarction, acute stroke, acute cerebral thrombosis, acute cerebral embolism, acute cerebral hemorrhage are all sudden diseases, such as acute coronary syndrome, acute myocardial infarction, are called sudden cardiovascular diseases. Finally some sudden traumatic injuries, such as crush injuries, collapse injuries, drowning, fire, soot choking injuries caused by car accidents or disaster medicine, are all sudden diseases.