The human body needs to drink more water when fever, the human body in fever is a high metabolic state, with the rise in body temperature, the body’s breathing and heartbeat will increase, this period with the skin heat dissipation, as well as the respiratory tract respiration accelerated, can lead to a large amount of water loss, so replenishment of fluids, drink more water has a very important significance. It is also important to drink plenty of fluids. It is not advisable to drink large amounts of fluids at one time, as this may lead to nausea and vomiting. Usually it is recommended to divide into several times, small amount of water, to achieve the purpose of hydration, for patients who can not eat can be appropriate to supplement electrolytes. Because the human body water loss process, also accompanied by the loss of sodium salt and potassium salt, for patients to replenish water, as well as replenish sodium salt, potassium salt electrolytes, to maintain the body’s water and electrolyte balance. If eating normally, the diet is not affected, appropriate supplementation of water so that patients can drink more water.