How Does Cancer Cause Fatigue?

There are several reasons why having cancer can lead to fatigue:

  • the disease itself;
  • cancer treatments;
  • co-occurring disorders such as anemia, malnutrition, hypothyroidism (under-functioning of the thyroid gland) or renal dysfunction (kidney disease);
  • chronic pain;
  • emotional distress;
  • lifestyle factors such as lack of exercise or a poor diet.

You can read in the What is Anemia? section about how chemotherapy can cause anemia which can lead to chronic fatigue. To help you cope with fatigue and anemia, the Living Well section contains tips to help you feel better. Some changes to your daily routine can reduce the impact of fatigue upon your life and help you continue with your cancer treatment.