Hypoglycemia is one of the common complications of diabetic patients, and serious hypoglycemia can even lead to death, so it is important to pay attention to it. The diagnosis standard of hypoglycemia is: blood sugar <2.8mmol/L for non-diabetic patients; for diabetic patients receiving medication, the diagnosis standard of hypoglycemia is ≤3.9mmol/L. Common clinical manifestations of hypoglycemia are mainly sympathetic excitation and neuropsychiatric disorder. In the early stage, sympathetic excitation and increased secretion of adrenaline are manifested as panic, hand trembling, sweating, pale face and hunger; if not corrected, neuropsychiatric symptoms such as dizziness, irritability or trance, slow reaction, personality change, and even convulsion and coma will appear in severe cases. The severity of hypoglycemia mainly depends on: 1. the speed of blood sugar drop; 2. the duration of hypoglycemia; 3. the responsiveness of the body to hypoglycemia is also related to age and whether there are other complications. In addition, many elderly diabetics have hypoglycemia and unperceived hypoglycemia, which mainly manifests as neurological damage, so pay attention to recognition and judgment, and do not mistake it for cerebrovascular disease. Hypoglycemia treatment process If hypoglycemia is suspected, those who are in a position to do so should immediately measure finger blood sugar, if blood sugar <3.8mmol/L Immediate treatment, the easiest is to let the patient eat sugary food (15-20g) immediately and retest finger blood sugar after 5-10 minutes, it is safe to keep it above 5mmol/L. In case of heavy and suspected hypoglycemic coma, capillary blood glucose should be measured promptly, even without blood glucose result, 50% glucose 20-60ml intravenous injection should be given immediately, followed by 5%-10% glucose solution intravenous drip, finger blood glucose should be retested every 5-10 minutes, and glucocorticoid treatment can be given if necessary. It is important to note that the delirious person, do not feed to avoid the inhalation tract accidentally lead to asphyxiation. The consequences of hypoglycemia are serious, so prevention is important, such as eating main meals on time, paying attention to the time and amount of exercise, and monitoring blood sugar changes.