The fever is not considered to be 37.1°C in the armpit of an adult, but the common locations for taking temperature are from top to bottom to the mouth, armpit and rectum. The most common location is the armpit, and there are 3 things you should do before taking your temperature. 1. It is best to take your temperature early in the morning, on an empty stomach, awake and at rest. 2. You should wipe the sweat under your armpit with a towel before taking the temperature, so that the sweat does not evaporate and affect the temperature reading. 3rd, the thermometer should be in contact with the armpit for at least 10 minutes. The normal body temperature is 36.0-37.3°C, so a body temperature of 37.1°C is within the normal range, so it is not considered a fever.