Fever is a common symptom of children, the rise in body temperature is determined by the neural reflexes, that is, the cerebral cortex, and during the day there are various excitement points to stimulate the baby’s cerebral cortex, this excitement makes the fever response temporarily inhibited, so the fever during the day is often not obvious, and the brain is at rest at night, the original fever response manifested, so the body temperature at night tends to be higher, and then there is the daytime baby activities also Because the fever is good for the baby’s spirit, it does not affect the baby’s play, and parents are busy during the day, often ignoring the baby’s fever, so you will feel that the fever is more at night. So whether it is daytime fever or nighttime fever, there are triggering factors, repeated fever for more than 48 hours, it is best to check the blood routine, according to the results of the blood routine symptomatic treatment, only to remove the triggering factors the child will have a normal temperature, will not be feverish again. If the temperature exceeds 38.5 degrees Celsius during the fever, promptly give Merlin or Tylenol to reduce the fever, below this temperature, with physical cooling can be. The interval between two doses of Merlin should be 4-6 hours, and Merlin and Tylenol can be repeated at an interval of three hours, but this way of medication should not exceed three days.