Causes of fever

A number of things can cause fever this can include some cancers, drugs and other treatment. Find out more about these.

The cancer itself

It's not really understood why certain cancers cause fevers and others don't. It's thought that some cancers may produce things like toxins that cause fever.


Fever can be caused by infection. Find out what can be done to control and treat your fever.

Other causes of fever

Apart from your treatment, there are a number of other reasons why you might get a fever when you have cancer. 

Last reviewed: 
05 Aug 2019
Coronavirus and cancer

We know it’s a worrying time for people with cancer, we have information to help.

Read our information about coronavirus and cancer