Judging your own fever can be done from the following aspects: 1. taking body temperature; 2. increasing pulse rate without inducements; 3. having fever triggering factors, such as not changing clothes in time after sweating. When you have a fever, you will be afraid of wind, cold, dizziness, weakness, and even cold sweat, so you should be alert to whether your skin is hotter on your body. If you feel that the skin temperature is higher, then you should take a thermometer to measure the body temperature, which is generally based on the traditional mercury thermometer to measure the axillary body temperature, measuring 5-10 minutes to know that you do not have a fever, if the axillary body temperature exceeds 37.5 ℃ consider having a fever.