A fever of 38℃ is not too serious and belongs to a low fever. When dealing with a low fever, it is important to pay attention to physical cooling and avoid taking fever-reducing drugs as much as possible, because drugs can have side effects on the human kidneys, so try to avoid taking drugs if you can. You can take warm water or alcohol to wipe the palms of your hands, feet, back and other parts that can easily dissipate heat, and avoid staying too long in the precordial area and abdomen, which are sensitive to cold stimulation. After wiping, pay attention to warmth measures and drink plenty of water in small amounts. It is usually normal to have fever for 3-5 days. You should pay attention to a light and easy-to-digest diet, avoid eating too greasy and stimulating, and avoid smoking and alcohol. There is another reason why the fever does not subside, is that the immune system is relatively low, we should pay attention to appropriate participation in sports, as well as through other methods to improve their immune system.