A:  Although there is no cure for ME/CFS, you should do your best to improve your health.

1. Modest exercise may worsen fatigue in many people with ME/CFS.
2. It's important to exercise within your limits.
3. Eat a well-balanced diet.
4. If possible, go to bed and get up at the same time every day.
5. Set reasonable limits for yourself.

A:  It is unclear why this happens. For most people, ME/CFS is a lifelong disease. Full recovery (a return to pre-illness functioning) is rare and estimated at less than 10%. For some people with ME/CFS, as time passes and their disease improves, they will find they can do more, but it is a slow and gradual process.

A:  Eating a healthful diet and getting regular physical activity can help reduce fatigue for many people. Treating the underlying cause of fatigue, whether this is poor sleep or a health condition, also helps. When fatigue affects safety , it becomes a public health concern.

A:  Possible causes. Because the cause of ME/CFS is not known, many potential causes are being studied. These include infections, how the body uses energy, how people respond to infection, inflammation, toxins or injury, and genetics.