Home > What is ME/CFS? > Causes of ME/CFS

Whilst the underlying cause of ME isn't clear, it's often triggered by a viral infection, and sometimes a bacterial infection. Glandular fever, the herpes virus, viral and bacterial meningitis can all trigger the condition. There are other triggers too, such as vaccinations, radiotherapy and chemotherapy, and physical trauma through surgery or an accident, although these are less common.

Contrary to belief, stress on its own does not cause ME, and many people who have led stressful lives do not go on to develop the condition. Whilst there is some controversy surrounding ME, including the view that it's mainly psychological rather than physical in origin, this view is widely-regarded as a complete myth by leading medical advisers and researchers into ME. Please click here to read about the symptoms of ME.