Hypoglycemia refers to the physiological or pathological condition of corresponding symptoms and signs caused by blood glucose lower than the normal low limit, which is not an independent disease but a manifestation of biochemical abnormalities and a clinical syndrome caused by various reasons. The severity of hypoglycemic symptoms is related to the level of blood glucose value, the speed of development and the duration of the disease, the faster the development and the longer the duration, the more obvious the symptoms. The main cause of hypoglycemia in diabetic patients is the overuse of oral medications such as sulfonylureas or insulin therapy. In addition, hypoglycemia can also be caused by increased activity after using hypoglycemic drugs, or unreasonable diet, or drinking alcohol on an empty stomach. The clinical manifestations of hypoglycemia include: 1. sympathetic excitation symptoms sweating, trembling, blurred vision, hunger, weakness, nervousness, pale face, palpitation, nausea, vomiting, and cold extremities, etc. (2) Inhibition of the central nervous system (1) Inhibition of the cerebral cortex: hazy consciousness, gradual loss of orientation and recognition, headache, dizziness, forgetfulness, language disorders, drowsiness and even coma and fall, sometimes mental disorder, fear, panic, hallucinations, mania, etc.; (2) Inhibition of the subcortical center: confusion, restlessness, clonic, choreographic or childish movements, tachycardia, pupil (3) Suppressed subcortical centers: deep coma, denervation, loss of reflexes, decreased respiration, decreased blood pressure, and narrowed pupils. 3 Mixed manifestations Both of the above manifestations are present. Treatment: 1. Treatment during seizure (1) Mild cases: Once the symptoms of hypoglycemia are confirmed, eat sugary food or drinks or candy immediately, and measure blood glucose quickly at the same time, and inject 50% glucose 40-60 ml immediately if it cannot be taken orally. (2) Serious illness: immediately inject 40-60ml of glucose by sedation, followed by food if you can eat, or 5%-10% glucose by sedation if you cannot eat, to maintain blood sugar at or slightly above normal. If the hypoglycemia is caused by euglycemia, the sugar supplement should last at least 3-7 days. 2.Glucose control level For the elderly and children, blood sugar should rather be high than low. The blood sugar level of diabetic patients should be maintained above 4.4, especially for senior patients and children, the blood sugar control level should be “better high than low” to prevent symptomatic hypoglycemia and unconscious hypoglycemia. Patients with diabetes are advised not to delay meals after taking glucose-lowering drugs or insulin injections, and to control the time and amount of exercise.