What are the symptoms of chronic fatigue syndrome?

Q: What are the symptoms of chronic fatigue syndrome?

A: Besides debilitating fatigue that is not alleviated by rest, common symptoms of chronic fatigue syndrome (CFS) include: more intense or changed patterns of headaches, reduced short-term memory or concentration, recurrent sore throats, tender lymph nodes, muscle discomfort or pain, joint pain without joint swelling or redness and sleep that is unsatisfying and fails to refresh. You may not experience all of these symptoms. The severity of symptoms varies with each individual.

Note that CFS may also be referred to as myalgic encephalomyelitis or chronic fatigue and immune dysfunction syndrome.