Fatigue continues to be a problem for many cancer survivors long after treatment ends and the cancer is gone. Studies show that some patients continue to have moderate-to-severe fatigue years after treatment. Long-term therapies such as tamoxifen can also cause fatigue. In children who were treated for brain tumors and cured, fatigue may continue after treatment.
The causes of fatigue after treatment ends are different than the causes of fatigue during treatment. Treating fatigue after treatment ends also may be different from treating it during cancer therapy.