When the fever reaches 39.5℃, the first thing you should do is to stay in bed and keep the indoor environment quiet, with moderate temperature and good ventilation. If you sweat a lot, you should change clean clothes in time, and you can also use warm water to wipe your body. Generally speaking the body temperature rises to 39.5 ℃, you can take antipyretic drugs to reduce the body temperature, it is recommended that when taking antipyretic drugs, you should take them in strict accordance with the dosage provided by the doctor, to prevent improper dosage of the drug and produce side effects. Normally, you should pay attention to drink more water, in fever breathing faster evaporation of water also become more, so pay attention to timely replenishment of water. Drinking more water can also encourage more urination, through urination is conducive to cooling and the excretion of toxins. In the diet should also pay attention to fever to make the metabolism faster, the consumption of nutrients greatly increased, the body water consumption also increased. At the same time, the secretion of digestive juices during fever is reduced, gastrointestinal peristalsis slows down, so the diet should pay attention to light and easy to digest.