36.3°C is not a low fever, but a normal body temperature range. Human body temperature varies slightly depending on the measurement site. The three commonly used measurement sites are the mouth, armpit and rectum, and the most convenient and comfortable measurement site is the armpit. Under normal circumstances, the body temperature range of the armpit is 36.0℃-37.2℃, with slight fluctuations in the morning and evening, generally low in the morning and high in the afternoon, fluctuating between 0.5-0.8℃ and not exceeding 1℃. Body temperature 37.3℃-38.0℃ is low fever, 38.1-39.0℃ is moderate fever, 39.1℃-40.0℃ is high fever, and over 40.1℃ is super high fever. If the body temperature is lower than 36.0℃ it is hypothermia, therefore 36.3℃ is normal body temperature. In conclusion, as long as the patient’s body temperature is not within the normal range, whether it is too high or too low, it is a pathological state and requires prompt medical attention.