Infections, fever, and general malaise
A high fever may be caused by an ongoing infection in your body. You can also experience other symptoms, including chills and shivering. You may also have an infection and still have a normal temperature. In these cases, you may only feel unwell.
The white blood cells count can be reduced during your cancer treatment. It means that the body cannot fight infection as usual. In these cases, you can easily get infected, and the main sign is an elevated temperature or feeling unwell.