A body temperature of 37℃ at night is normal and not considered a fever. In our daily life, the more widely used method of measuring body temperature is the axillary temperature, the normal temperature range of the axillary temperature is 36-37.2 ℃, generally in the afternoon and evening body temperature is usually slightly higher than the morning body temperature, so 37 ℃ at night is normal. In addition, be sure to wipe your armpits when measuring your temperature to prevent sweat from affecting the measured temperature. Secondly, the thermometer should be clamped tightly. When measuring temperature, avoid the influence of strenuous exercise, eating, mental stress and other factors, the time of clamping the thermometer should be at least 5 minutes, sometimes can be clamped for 10 minutes, so as to ensure that the measured value is accurate. If the temperature measured after the above conditions is 37℃, then it is considered to be a normal temperature, not a fever.