If it is determined that the fainting is caused by hypoglycemia, for patients who are still conscious, first help them to lie or sit down and rest, and at the same time give them sugar cubes or sugar water, so that their blood sugar can return to normal as soon as possible. If the patient has severe hypoglycemia, is unconscious and does not respond to calls, move the patient to a safe and open place, call 120 at the same time, send him/her to the hospital immediately, and inject glucose or adrenocorticotropic hormone and glucagon intravenously to quickly raise the patient’s blood glucose to more than 2.8 mmol/L. If the patient cannot correct the hypoglycemia in time after the coma, the central nervous system may be damaged, and if the hypoglycemic coma is not corrected all the time, the patient’s life may be endangered. If hypoglycemia has caused central nervous system damage, hypoglycemic symptoms should be relieved first, and then nerve-nourishing drugs should be used to restore nerve function. Before the hypoglycemic patient is unconscious, sympathetic excitation usually occurs, which can lead to panic, sweating, hunger, and also easy to have weakness of limbs, and some patients will have nausea, vomiting and dizziness. At this time, the patient is still conscious and should immediately eat sugar-containing substances, including glucose, honey water, small cookies and snacks. If the patient’s blood sugar still does not return to normal 5-10 minutes after eating, he or she should eat again and try to make the blood sugar rise rapidly. After the hypoglycemia is corrected, the cause of the hypoglycemia should be checked to try to avoid the recurrence of hypoglycemia.