Chronic fatigue syndrome (CFS) is a long-term condition characterised by severe fatigue that is not relieved by rest. It can also be accompanied by a number of other symptoms, such as muscle pain, headaches, and cognitive difficulties.

The exact cause of CFS is unknown, but it is thought to be caused by a combination of factors, including infection, immune system dysfunction, and psychological stress.


There is a growing body of research into the possible links between CFS and cancer. Some studies have suggested that CFS may be a risk factor for cancer, while others have found that cancer survivors are more likely to develop CFS.

One study, published in the journal Nature Medicine, found that patients with CFS had higher levels of certain immune cells, known as T cells, than people without CFS. T cells play a role in the body’s immune response to infection, and they may also be involved in cancer development.

Another study, published in the journal Cancer Causes & Control, found that women with breast cancer were more likely to develop CFS than women without breast cancer. The study also found that CFS was more common in women with advanced breast cancer.


The links between CFS and cancer are complex and not fully understood. More research is needed to confirm these links and to determine the underlying mechanisms.

Additional Information

There is no cure for CFS, but there are treatments that can help to manage symptoms. Treatments may include:

  • Rest: Rest is essential for people with CFS. It is important to listen to your body and rest when you need to.
  • Exercise: Exercise can help to improve energy levels and physical function. However, it is important to start slowly and gradually increase the intensity and duration of your exercise.
  • Therapy: Therapy can help to manage stress, anxiety, and depression.
  • Medication: Medications, such as antidepressants and corticosteroids, may help to reduce symptoms.

Patient Support

There are a number of patient support groups available for people with CFS. These groups can provide information, support, and advice.


CFS is a complex condition that can have a significant impact on a person’s life. Research into the possible links between CFS and cancer is ongoing, and more information is needed to understand these links and to develop effective treatments.

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