Pyrexia could be a key sign that cancer has spread or is ‘advanced’ – ‘very uncomfortable’

In fact, night sweats that come on for any apparent reason have been named a sign of some blood cancers like Hodgkin lymphoma and non-Hodgkin lymphoma.

In Hodgkin lymphoma, there is a rare condition that can cause fever to strike in cycles, meaning it rises and falls in weekly intervals.

This means a person may have days or weeks without having a raised body temperature, before seeing their fever return.

It is poorly understood why some cancers cause fever more than others, but one theory is that certain diseases produce toxins, which are more likely to cause fever.