A 6-month-old baby with a temperature of 37.8 degrees is considered to have a low-grade fever. The human body’s normal temperature is 36 degrees – 37.5 degrees between, and 37.5 degrees – 38.5 degrees is a low fever, more than 38.5 degrees is a high fever. And the baby in the measurement of temperature, must be in a relatively quiet state, not just eaten milk on the measurement of temperature, also can not be in his violent crying, or body sweating, sweating when the measurement of temperature, this is not very accurate. If the temperature is 37.8 degrees after accurate temperature measurement, it is a low fever. The first thing you can do is to put a fever-reducing patch on your head, drink more warm water, and then retake your temperature after half an hour. If the temperature drops, you can observe it again. If the temperature continues to rise, it is best to go to the hospital for a checkup.