If a patient has sudden dizziness accompanied by false sweating, the following factors should be considered: 1. Hypoglycemic reaction, especially for patients with previous history of diabetes, who have applied excessive hypoglycemic drugs and have not eaten in time or after strenuous exercise, dizziness will appear when blood glucose is lower than 3.9 mmol/L, accompanied by a lot of false sweating, palpitations, hand tremors and other symptoms. 2. obvious coronary heart disease, accompanied by a history of unstable and indefinite angina, once the above situation occurs, the patient should be considered to have acute coronary syndrome, such as accompanied by obvious chest pain, precordial discomfort, dyspnea and other symptoms, must quickly call 120 for rescue. 3, if the patient has an obvious high fever, for patients with a previous history of cold on, respiratory infections and other medical conditions, the above situation should be considered to be caused by infectious factors.