Measuring body temperature under the arm is a common practice in healthcare settings and homes. It involves placing a thermometer in the armpit and holding it there for a few minutes to obtain a reading. This method is generally considered less accurate than taking a temperature rectally or orally, but it is often preferred due to its ease and convenience.
The normal body temperature range is between 97.6F (36.4C) and 99.6F (37.6C). However, variations can occur due to factors such as age, time of day, and activity level. It is important to note that a fever, which is defined as a body temperature of 100.4F (38C) or higher, can be a sign of an underlying infection or illness and should be evaluated by a healthcare professional.