What is cancer-related fatigue?

What is cancer-related fatigue?

Cancer-related fatigue (CRF, sometimes simply called "cancer fatigue") is one of the most common side effects of cancer and its treatments. Many people who are chronically ill feel tired. But cancer-related fatigue goes beyond the usual tiredness. People who experience cancer fatigue often describe it as "paralyzing." Usually, it comes on suddenly and is not the result of activity or exertion. With this type of fatigue, no amount of rest or sleep helps. You feel physically, emotionally and mentally exhausted most of the time.

Cancer fatigue may last a few weeks (acute) or for months or years (chronic). Chronic cancer fatigue can harm your quality of life.