Sudden fainting from hypoglycemia is more dangerous, you can let the patient eat food with high sugar content, or let the patient take glucose solution orally or intravenously, and at the same time, actively seek medical treatment for further examination. When hypoglycemic fainting occurs, if the patient is in a clear state of mind, you can let the patient take some sugary foods or pastries by mouth, or let the patient take glucose solution by mouth. If the patient is unable to eat or is confused, glucose solution can be infused into the patient’s vein. When the patient faints from hypoglycemia, it is also necessary to call an ambulance to take the patient to the hospital. Further, other tests such as electrocardiogram, electroencephalogram, myocardial enzyme profile, and blood tests should be performed to rule out myocardial infarction, cerebral infarction, and other diseases.