Hypoglycemia firstly needs to clarify the cause of the disease and be treated according to the cause. Hypoglycemia may be caused by physiological reasons, or it may be caused by pancreatic islet cell tumors, improper use of medicines, etc. It can be treated by medicines and surgical methods. 1. Physiological reasons: it may be that the sugar absorbed into blood through intestine is very little, which can’t satisfy the consumption of human body, and it is common in people who have lost weight, after intestinal resection and so on. Patients can take glucose or sugary food orally in time, if there is no relief in 15 minutes, they should go to the hospital in time. 2. Pathologic causes: (1) Islet cell tumor: it is an insulin-secreting neuroendocrine tumor in the pancreas, and these patients often have episodes of hypoglycemia in fasting, which requires surgical resection of the tumor for treatment. (2) Improper use of drugs: the causes of hypoglycemia may be improper use of insulin, eating less or not eating on time after injecting insulin, improper use of insulin agonist, etc. Patients are advised to consult their doctors in time to adjust their hypoglycemic drugs. Patients who find hypoglycemia should go to the hospital in time to clarify the cause of the disease and follow the doctor’s instructions for drug or surgical treatment to avoid delaying the condition.