![]() In people with cancer, weakness might be caused by having and recovering from surgery, low blood counts or low electrolyte (blood chemistry) levels, infection, or changes in hormone levels. For some people with cancer, this kind of fatigue causes more distress than pain, nausea, vomiting, or depression. Rest might help for a short time but does not make it go away, and just a little activity can be exhausting. People with cancer might describe it as feeling very weak, listless, drained, or “washed out” that may decrease for a while but then comes back. Some may feel too tired to eat, walk to the bathroom, or even use the TV remote. The fatigue felt by people with cancer is different from the fatigue of daily life and different from the tired feeling people might remember having before they had cancer. Between 80% and 100% of people with cancer report having fatigue. The fatigue that often comes with cancer is called cancer-related fatigue. ![]() It can have many causes, including working too much, having disturbed sleep, stress and worry, not having enough physical activity, or going through an illness and its treatment. Fatigue is something that lasts even when a person seems to be getting enough sleep. Fatigueįatigue is feeling extremely tired or lacking energy, often described as being exhausted. Weakness can be a big part of why cancer patients feel fatigue. Weakness is due to loss of muscle strength. ![]() Weakness is a feeling of decreased strength and needing extra effort to move a certain part of the body or the entire body. Fatigue and weakness are often used to describe the same thing. ![]()
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