Newborn baby body temperature 37.4 ℃ is not normal, the baby’s normal body temperature axillary 36-37 ℃, lower than 36 ℃ is hypothermia, higher than 37 ℃ is fever. But the baby’s thermoregulatory center is not yet well developed, the body temperature is susceptible to environmental factors, such as high indoor temperature, wearing too many clothes, too thick covers, just after eating food or just after exercise, can cause the baby’s body temperature to rise temporarily. Parents can lower the room temperature and reduce the thickness of the baby’s clothes and blanket. If the body temperature is still 37.4℃, the baby is considered to have a fever, which is low fever, and needs physical cooling treatment, such as applying antipyretic patches to the forehead or taking warm water baths, etc. You can also give the baby some warm water in small amounts to replenish water. In addition to physical cooling, we should actively look for the cause of the fever and treat the cause so as to completely improve the symptoms of the fever.