A child with recurrent fever for five days can have adverse effects on the child. Repeated fever can lead to brain cell damage, especially when the body temperature is greater than 38.5 degrees or 39 degrees, which can easily induce the occurrence of febrile convulsions and produce irreversible damage to the child’s brain cells or brain function, with still more serious consequences. In the process of febrile convulsions, it is easy for accidents and injuries to occur. In addition, the occurrence of recurrent fever indicates that the cause of the fever persists, and if a bacterial infection occurs, the infection is often more serious. If not actively treated, it is likely to lead to systemic sepsis, which is very dangerous and may lead to death. If recurrent fever due to diarrhea occurs, it is easy to become dehydrated without active treatment, and it is also dangerous if the child is small and dehydrated.