Generally speaking, the normal temperature of the baby’s armpit is between 36℃ and 37.2℃. When determining whether the baby’s armpit temperature is normal, many factors need to be taken into consideration, such as the temperature of the surrounding environment, because the baby’s thermoregulatory center control ability is not perfect, it is easily affected by the temperature of the surrounding environment, so it is necessary to ensure that the temperature of the surrounding environment is appropriate. When the baby has just experienced strenuous activity, the body may cause the axillary temperature to be higher due to heat dissipation, causing the measured temperature to be inaccurate, so when measuring the temperature, try to do so when the baby is in a relatively calm state. If the axillary temperature is between 37.3℃ and 38℃, it is a low fever. While observing the temperature, you should also pay attention to the baby’s mental state, and if the mental state is poor, you should go to the hospital even if it is a low fever.