Fatigue is an extreme feeling of tiredness or exhaustion, and is one of the most commonly reported symptoms of cancer and its treatments. Between 80% and 100% of people with cancer report having fatigue, and approximately one-third of cancer survivors report that fatigue can last months or even years after treatment ends. How much fatigue you have, and how long it lasts, may be related to your type of cancer, what treatments you are getting, and your general health. To help you mana...