A body temperature of 36.9 degrees Celsius in the afternoon is normal. The temperature of the human body consists of the internal temperature as well as the surface temperature. Internal temperature is usually measured through the mouth and anus, and a temperature of 37.3 degrees Celsius or less is considered normal. Surface temperature is usually measured through the forehead, armpits and ears, and a temperature of 36 degrees Celsius to 37 degrees Celsius is considered normal. A temperature of 37.1 degrees Celsius to 38 degrees Celsius is considered low fever, 38.1 degrees Celsius to 39 degrees Celsius is considered moderate fever, and 39.1 degrees Celsius or above is considered high fever. In addition, the human body temperature will fluctuate with the day and night movement and emotional changes and other factors, 2:00 to 5:00 a.m. when the human body temperature is the lowest, 5:00 to 7:00 p.m. when the human body temperature is higher. When emotional excitement, sympathetic nerve excitement, can also make the body temperature has increased. A body temperature of 36.9 degrees Celsius in the afternoon is normal and there is no fever. If you are not feeling well, you can take a new measurement. If the measurement is normal, there may be other reasons for not feeling well, so go to the appropriate department in the hospital as soon as possible for examination.