Chronic fatigue syndrome.(Disease/Disorder overview)

What is chronic fatigue syndrome?

Chronic fatigue syndrome (CFS) is a condition of overwhelming fatigue that lasts for at least 6 months and interferes with your daily life.

Most people with CFS are 20- to 40-year-old adults. The syndrome affects women more often than men. However, men and women of all ages can have CFS.

How does it occur?

The cause of chronic fatigue syndrome is not known.

What are the symptoms?

Physical symptoms of CFS may include:

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