Drinking light salt water is still useful when you have a fever. When the patient has a fever, especially when the fever goes down, the body will lose a lot of water, which will easily lead to the imbalance of water and electrolytes in the body, so drinking light salt water can replenish electrolytes. If you think that salt water has sterilization, anti-inflammatory effect, want to drink salt water to treat fever general effect is not great, but you can brush your teeth in the morning and evening and after eating with light salt water gargle, you can inhibit the growth of bacteria and viruses in the mouth, and effectively stop the spread of viruses and bacteria can also play a preventive role. In addition to salt water, you can also boil ginger brown sugar water, can help sweat.