Sudden illnesses include the following: 1) various traumatic injuries, such as car accidents, falls, burns, fractures and so on. The most serious ones are fall injuries and car accident injuries, which can combine with multiple systemic injuries and are easily life-threatening. 2. cardiovascular diseases, such as malignant arrhythmia, angina pectoris, myocardial infarction, and even sudden cardiac death. 3. cerebrovascular diseases, such as stroke and cerebrovascular accidents, such as cerebral hemorrhage or cerebral infarction. 4. allergic diseases, such as drug Allergy or food allergy. In mild cases, a generalized rash may appear, and in severe cases, laryngeal edema or even pulmonary edema may cause respiratory distress and anaphylactic shock, leading to life-threatening conditions. 5. Various acute abdominal conditions, such as acute appendicitis, acute gastrointestinal perforation, gastrointestinal bleeding, etc.