I. Symptoms of suspected heart attack 1. chest pain radiating to the arm or jaw; 2. shortness of breath, chest tightness, dizziness, nausea; 3. early medical treatment can minimize the damage caused by the lesion and improve the long-term prognosis. 2.Suspected stroke symptoms To determine stroke symptoms, remember the FAST principle: 1.FACE, observe whether there is unilateral facial droop by laughing or grinning; 2.Arm, raise both arms flatly forward at the same time to see whether there is weakness on one side; 3.Speech, observe whether there is slurred speech; 4.Time, if any of the above manifestations occurs, call the emergency number immediately. Serious bleeding 1.May occur in traffic accidents, trauma, disease, etc.; 2.If local direct pressure and hemostatic point pressure cannot effectively stop bleeding, go to the emergency room for disposal; 3.For deeper and larger wounds, debridement and suturing may be required. Head trauma 1.May occur in intense sports, traffic accidents, falls, etc.; 2.If loss of consciousness, convulsions, vomiting and other symptoms appear soon after the trauma, it is more dangerous; 3.If head trauma is accompanied by eye injury, it should also go to the emergency room for treatment. V. Symptoms of influenza in eyes Difficulty in breathing, blue lips or skin, dizziness, confusion, persistent vomiting (call emergency immediately when flu + any of the above manifestations). The following cases can be continued for observation or elective outpatient treatment 1. common cold symptoms; 2. minor burns with skin still intact; 3. shallower and shorter cuts; 4. lighter muscle sprains and strains; 5. vomiting and diarrhea within 24 hours without signs of dehydration.