Hypoglycemia is a group of syndromes in which glucose levels in the blood are lowered for a variety of reasons, causing corresponding clinical symptoms, and the symptoms can subside as blood glucose levels rise. Once hypoglycemia occurs, it is quite dangerous, so the emphasis is on prevention. Prevention of hypoglycemia: Diagnostic clues for hypoglycemia include a history of diabetes mellitus, use of glucose-lowering drugs, especially insulin, use of non-glucose-lowering drugs, a history of alcohol abuse, and systemic related illnesses, especially neoplasms, wasting diseases, malnutrition, and a history of gastrointestinal surgery. For unexplained cerebral dysfunction, blood glucose should be monitored in a timely manner. Repeated and prolonged severe hypoglycemia in patients can cause irreversible brain damage, supplying early recognition and prevention. Further localization and diagnosis should be carried out for suspected insulinoma, and surgical resection should be carried out for patients with definite insulinoma. Treatment of hypoglycemia: The treatment of hypoglycemia consists of two aspects: one is to relieve the symptoms of insufficient nerve sugar supply, and the other is to correct the various causes of hypoglycemia. For mild to moderate hypoglycemia, oral sugar water, sugary drinks, or eating candy, propecia, bread and buns can relieve it. For drug-related hypoglycemia, the relevant drugs should be discontinued promptly. For severe cases and patients suspected of hypoglycemic coma, blood glucose should be monitored immediately, even without the need for blood glucose results, 50% dextrose 60-100 ml intravenous injection should be given immediately, followed by 5%-10% glucose solution intravenously, and hydrocortisone 100 mg or glucagon 0.5-1 mg intramuscularly or intravenously can be added if necessary. Do not feed the confused person to prevent respiratory asphyxiation. Individuals on insulin or insulinotropic drugs in combination with alpha glucosidase inhibitors should be treated with pure glucose for symptomatic hypoglycemia. Because alpha glucosidase inhibitors slow the digestion of other carbohydrates, other forms of carbohydrates such as starchy foods and sucrose are unable to correct hypoglycemia in a timely manner. Therefore, the treatment of hypoglycemia, emergency treatment to replenish blood sugar is only one aspect, more important is to find the cause of the disease and usual prevention.