In this video, Mark Yoder (N.P., Oncology) gives an overview of cancer fatigue / lack of energy, and some tips for dealing with this common treatment side effect. The physical, mental and emotional stress of cancer treatments such as radiation, chemotherapy or hormone treatment can cause fatigue and other serious health consequences. Lack of energy is one of the most common side effects of cancer and its aggressive treatment. The experiences of exhaustion and tiredness are common side effects and should be recognized.