Axillary 37.1 ℃ is not necessarily a fever, may be a measurement error or physiological temperature rise, need to monitor the temperature change. 1. Measurement error: the normal body temperature in the armpit is 36 ~ 37 ℃, the measurement of temperature in the armpit need to keep the armpit dry, no sweat, no heating or cooling items in the armpit, the thermometer head placed in the armpit deep clamping, 10 minutes after the removal of the readings, the above measurement process there is a misunderstanding of the body temperature affects the correctness of the number of degrees. 2. Physiological temperature rise: people in the eating, exercise and other circumstances will appear temperature rise, will not be accompanied by other uncomfortable symptoms, known as physiological temperature rise, axillary temperature will appear 37.1 ℃. An axillary temperature of 37.1°C is not necessarily a fever, but it needs to be monitored closely to see if the temperature will drop to normal. If the body temperature continues to rise, or chills, chills and other discomforts occur, it is necessary to immediately consult a doctor to clarify the diagnosis in time to avoid delayed treatment.