There is no such thing as “scary performance of hypoglycemia”, the clinical manifestations of hypoglycemia include fatigue, hunger, cold sweat, etc., which can be relieved after timely replenishment of sugary food or intravenous glucose injection. Hypoglycemia is caused by the plasma glucose level drops below normal, hypoglycemia adult patients can have panic, sweating, hunger, fatigue, tremor and other symptoms, the serious can have mental changes; the elderly hypoglycemia sympathetic excitation symptoms are not obvious, there can be personality changes and other symptoms; newborns hypoglycemia can be shortness of breath, easy to cry and other manifestations. Once the symptoms of hypoglycemia, need to immediately eat sugary foods, such as sweet drinks, chocolate, cookies, etc., coma patients need to be treated with intravenous glucose supplementation. Patients with symptoms of hypoglycemia that are not relieved by sugary foods are advised to go to the hospital.