Hypothermia is the medical term for a low fever, also known as hypothermia in the general population, which is a mouth temperature between 37.3°C and 38.0°C. Usually, the normal range of body temperature is between 36.2°C and 37.2°C. Hypothermia can be caused by a variety of reasons, such as functional fever, infectious fever, non-infectious fever, etc. It is recommended to visit the hospital for further consultation and management.