After consuming a large number of lychees at one time will appear hypoglycemic symptoms, mainly manifested as dizziness, panic, sweating, hand trembling, hunger and even fainting, which is the appearance of hypoglycemia after consuming lychees. The reasons for hypoglycemia after consuming lychee are as follows: First, lychee contains relatively high sugar and most of it is fructose, containing very little glucose, fructose needs to be converted into glucose to be able to raise blood sugar. Second, fructose can promote insulin secretion, and insulin has the effect of lowering blood sugar, so a short time intake of a large number of litchi, the body absorbs more fructose, can stimulate the secretion of insulin, but the speed of conversion of fructose into glucose is not consistent, resulting in insufficient glucose to raise blood glucose concentration, it will lead to hypoglycemia occurs. Third, the intake of a large number of lychees will also inhibit the liver from producing glucose, thus aggravating the symptoms of hypoglycemia.