If a child’s fever reaches 39.5 ℃, the following measures need to be used to deal with: 1, first of all, hasten to apply antipyretic drugs, such as the application of acetaminophen suppositories or ibuprofen suppositories, because children’s temperature reaches 39.5 ℃, it will often lead to headache, lack of spirit, and even cause convulsions. At this time, we must promptly carry out heat treatment, in order to improve the symptoms of discomfort. 2, secondly, physical cooling, such as timely warm bath, through the evaporation of water, can play a certain degree of fever. In addition, the application of oral rehydration salts, because children after the fever water, electrolyte consumption is relatively large, the application of oral rehydration salts can play a role in rehydration and replenishment of electrolytes.