Factors that may increase your risk of chronic fatigue syndrome include:

  • Age. Chronic fatigue syndrome can occur at any age, but it most commonly affects people in their 40s and 50s.
  • Your sex. Women are diagnosed with chronic fatigue syndrome much more often than men, but it may be that women are simply more likely to report their symptoms to a doctor.
  • Lifestyle. People who are overweight and inactive are more likely to develop chronic fatigue syndrome. Stress also appears to be a factor.
Jun. 18, 2011