Coping physically
Having a fever means your body temperature is higher than normal. Something inside your body, such as an infection, has caused your temperature to rise.
A number of things can cause fever. This can include some cancers, drugs, and other treatments.
Fever can be caused by infection. Find out what symptoms to look out for and the different types of infection.
Treatment for a fever will depend on what's causing it. As well as treating the cause of your fever, you need treatment for your fever symptoms.
Sepsis is a serious complication of an infection that can be life threatening. Fever might be the first sign of an infection, or you might have other symptoms.
Last reviewed: 07 Apr 2026
Next review due: 06 Apr 2029