Q: How many degrees do you add when you take a temperature under the arm? ... A digital thermometer can take an oral, rectal or axillary temperature. Axillary, or armpit temperature is the least accurate of the three. An armpit temperature is generally 1 degree lower than an oral temperature.

Are you supposed to add 2 degree under the arm?

A temperature measures body heat. A thermometer (ther-MOM-uh-ter) is used to take the temperature in your armpit. An axillary temperature is lower than one taken in your mouth, rectum, or your ear. This is because the thermometer is not inside your body such as under your tongue.

Is taking temperature in armpit accurate?

Rectal temps are the most accurate. Forehead temps are the next most accurate. Oral and ear temps are also accurate if done properly. Temps done in the armpit are the least accurate.