A fever in a healthy child is
usually not dangerous, especially if the child does not have other symptoms and
the fever goes away in 3 to 4 days. Most children who have a fever will be
fussy and play less and may not eat as much as usual.
may make your child uncomfortable, but they rarely cause serious problems.
There is no medical evidence that fevers from infection cause brain damage. The
body limits a fever caused by infection from rising above
106 °F (41.1 °C). But outside heat—such as from
being in a car that is parked in the sun—can cause body temperature to rise
above 107 °F (41.7 °C), and brain damage can
Childhood immunizations can reduce the risk for
fever-related illnesses, such as
Haemophilus influenzae type bHaemophilus influenzae (Hib) infection.
Although no vaccine is 100% effective, most routine childhood immunizations are
effective for 85% to 95% of the children who receive them. For more
information, see the topic
It is not unusual for a
preschool-aged child to have 7 to 10 viral infections in a year. Each new viral
infection may cause a fever. It may seem that a fever is ongoing, but if 48
hours pass between fevers, then the new fever is most likely from a new
Common causes of fever include:
Teething does not cause a fever. If a baby is teething and
has a fever, look for other symptoms that may need to be evaluated.
A fever that increases quickly may lead to a
fever seizure in some children. After a fever has
reached a high temperature, the risk of a seizure is less. Fever seizures can
be frightening to see, but they usually do not cause other problems, such as
intellectual disability, or learning problems. If your
child has a high fever and a seizure, see the topic