systemic
Fever
Also called: Pyrexia
A fever is a temporary increase in your body temperature, often due to an illness. It's a sign that your body is fighting off an infection.
Frequently asked questions
Is a fever always a bad thing?
No, a fever is often a sign that your body is fighting off an infection. It's a natural defense mechanism.
When should I worry about a fever in a child?
You should seek medical attention for a child with a fever if they are very young (under 3 months), have a high fever (over 102°F or 38.9°C), or have other concerning symptoms such as difficulty breathing or seizures.
Can a fever cause brain damage?
Fevers themselves rarely cause brain damage. However, very high fevers (over 107°F or 41.7°C) can be dangerous and may lead to complications.
Not sure what's causing this?
Answer a few questions and we'll point you toward the most likely causes and next steps.
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