There are various clinical methods of measuring body temperature, the most common being the axillary temperature. If there are special reasons, the oral temperature and rectal temperature can also be measured. It is normal for the oral and rectal temperatures to be closer to the body temperature and to be slightly higher than the axillary temperature. The axillary temperature is more convenient to measure, so it is more commonly used in clinical practice. Normally, before measuring the axillary temperature, the thermometer should be shaken to below 35°C as well as the sweat in the armpit should be wiped away before measurement. After clamping the thermometer tightly for 5-10 minutes to measure, the normal value is between 36-37℃. If it exceeds 37.1℃, it is considered fever; if it exceeds 38.1℃, it is moderate fever; if it exceeds 39℃, it is high fever. After a fever, you can use physical cooling methods and drink more water. If it exceeds 38.5℃, you can take antipyretic drugs.