Children should not eat sugar during fever, excessive consumption of sweets will reduce the immunity of children, a large number of sweets rich in sucrose, fructose and other ingredients. When the body’s blood sugar exceeds a certain level, the following two things will happen. One, is to promote the accelerated growth and reproduction of purulent bacteria such as Staphylococcus aureus, triggering skin infections. Second, is when sugar decomposition in the body to produce heat, will produce a large number of pyruvic acid, lactic acid and other acidic metabolites, so that the body into an acidic constitution. Acidic body is not only prone to infection, but also can cause some children’s other diseases, such as achondroplasia, beriberi, chronic dyspepsia, irritability, etc., and serious can also cause immune system diseases. Therefore, children during the fever is absolutely not able to eat sugar, which is unfavorable to the recovery of fever.