You can drink salt water with less salt when you have a fever. Generally, you only need to add 1g of salt to a cup of 500ml of warm water, which can be decided according to your taste, or you can drink a small amount many times. If you are worried about the amount of salt, you can also go directly to the pharmacy and buy oral rehydration salt and use it according to the drug instructions. When you have a fever, you have to monitor your body temperature more often. If you have a low fever, you can cool it down physically and take fever-reducing medicine orally, and under normal circumstances the next day, the body temperature will return to normal. And if there is a high fever, you must go to the hospital for treatment in time to achieve a better cooling effect. When you have a cold and fever, you need to pay more attention to keep warm, pay attention to rest, eat more fresh fruits and vegetables, drink more warm water and eat light food to help the absorption of the stomach.