Pronounced: CAN-sir Fah-TEEGEn Español (Spanish Version)
Cancer fatigue is when you feel very weak and exhausted during cancer treatment. You may struggle to complete daily tasks. Fatigue can last for weeks or even years.
Chemotherapy Through Cardiovascular System
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Cancer and the side effects of treatment cause this condition. If your body is already weakened by cancer when treatment begins, then it is even more difficult to handle the side effects.
These conditions are caused by cancer or cancer treatment and can add to fatigue:
- Anemia—due to chemotherapy, which can kill red blood cells and affect the blood-forming cells in bone marrow
- Poor nutrition and dehydration—due to loss of appetite, nausea, and vomiting
- Lack of oxygen—due to fewer red blood cells, which carry oxygen
- Hormonal changes—due to hormonal therapies, side effects of treatment, or type of cancer, such as thyroid cancer
- Lack of sleep
- Side effects of medicines
Last reviewedDecember 2013by Mohei Abouzied, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.