Several other factors could contribute to fatigue, including: Tumor cells compete for nutrients, often at the expense of the normal cells' growth. Decreased nutrition from the side effects of treatments (such as nausea, vomiting, mouth sores, taste changes, heartburn, or diarrhea) can also cause fatigue.
Decreased physical activity, which may be the result of colorectal canceror its treatment, can lead to tiredness and lack of energy. Regular, moderate exercise can decrease these feelings, help you stay active, and increase your energy.
It is also characterized by multiple nonspecific symptoms such as headaches, recurrent sore throats, muscle and joint pains, and memory and concentration difficulties. Profound fatigue can come on suddenly or gradually and persists or recurs throughout the illness.
Fatigue is the most common side effect of cancer treatment with chemotherapy, radiation therapy, or selected biologic response modifiers. Research indicates that for at least a subset of patients, fatigue may be a significant issue long into survivorship.
The illness can severely affect school, work, and leisure activities, and cause physical and emotional symptoms that can last for months or even years. Chronic fatigue syndrome is more common in females than males and affects all racial and ethnic groups.