Drinking more water when you have a fever is effective. Because in fever, with the rise of body temperature, the body’s breathing faster, heartbeat faster, blood circulation is increased. At this time, with the breathing and body skin heat dissipation, will take away a lot of water, this time to supplement the liquid can maintain the balance of the internal environment, at the same time can accelerate the body’s metabolism, promote the excretion of waste. Usually, when the body temperature is less than 38 ℃ below the low-fever patients, the method taken is to drink more water and observation method for treatment. If the body temperature exceeds 38.1℃ or higher, it can be combined with physical cooling methods to reduce fever. Usually, rehydration fluids and warm water baths can reduce the body temperature to normal. For patients with persistent high or very high fever, consider a combination of medications to reduce fever.