Pneumonia is mainly caused by viral, bacterial and other pathogenic microbial infections, which can cause fever, cough, cough sputum, and also nausea, vomiting and diarrhea. Due to the symptoms of elevated body temperature and coughing and diarrhea, the body will evaporate or excrete too much water, and it needs to be replenished with water, and you need to drink a lot of water and eat more fresh fruits. As most of the need to use antipyretic and analgesic drugs, after eating these drugs will also sweat too much, will take away a lot of water from the body, need to drink more water to replenish, to prevent dehydration. By drinking more water can also play the role of urination, can take away part of the body’s heat, is conducive to fever, but also conducive to the body’s metabolism, can promote the recovery of the disease. Drinking more water can also flush out the toxins in the blood, prompting the elimination of toxins, but also to dilute the toxicity of the drug, but also to reduce the damage of the drug to the liver and kidneys.