If you use physical cooling methods to relieve the temperature when you have a low fever, you should use warm towels for external application. You should use water temperature around 40-50°C and use warm towels for external application on the forehead, armpits, groin, palms, feet and neck. The use of cold towels has a large temperature difference, making the patient feel poorly, and the use of too hot towels is not conducive to heat dissipation. When using a warm towel on the forehead, make sure to give the patient more water and keep the air convection in the room, but the patient should not be in the vent, and if the body temperature can be restored to normal by using physical cooling, there is no need to use medication. If physical cooling does not bring the body temperature back to normal, drugs can be added to reduce fever, commonly used drugs to reduce low fever are ibuprofen, acetaminophen, Xiao Chai Hu granules, etc. There are many different causes of low fever, and further cause-specific treatment is needed.