The basal body temperature range for infants and children is between 36.9-37.5°C. A low fever is usually within 38°C, and a fever over 39°C is considered high. If the baby has a low fever, parents should not be at a loss, first of all, to understand the baby has a low fever, whether it is a physiological fever or pathological fever. Physiological fevers are usually caused by babies wearing too many clothes or being covered too thickly with blankets. In addition, babies may have a brief period of high body temperature when they are too emotional or after a full meal. At this time, it is necessary to observe whether the baby is not in good spirits or other uncomfortable conditions, in addition to temperature changes, if not, it is only necessary to physically lower the temperature. There are many pathological causes of low fever in infants and children, because any problem in any part of the baby’s body may cause a low fever, in addition to bacterial infections can also cause a low fever. So go to a regular children’s hospital for a detailed examination and then treatment. Finally, parents should not be too anxious when their baby has a low fever, they can usually give their baby more water to speed up sweating and help prevent the appearance of low fever. Daily dress should not be too heavy, according to the weather conditions appropriate to add or subtract clothing for the baby, do not wrap too tightly.