Chronic fatigue syndrome,
also known as systemic exertion intolerance disease, is a condition that causes extreme, long-lasting fatigue
which can limit the ability to participate in ordinary, daily activities.
It generally occurs in young adults (20 to 40 years of age) and is twice as common in women.
The main symptom is disabling fatigue that does not improve with rest.
Other signs and symptoms may include muscle pain, joint pain, concentration and memory problems, headaches, sleep problems, fever, sore throat, and/or tender lymph nodes.
The exact cause is not known.
Symptoms are similar to many conditions that need to be ruled out; the diagnosis is often delayed and patients are frequently misunderstood. There is still no cure for this condition but there are several clinical trials
. Current treatment consists of cognitive and/or behavioral therapy and focuses on improving symptoms.
There is controversy and debate in the medical literature about the relationship between myalgic encephalomyelitis
and chronic fatigue syndrome and there is no consensus on nomenclature or classification for these disorders. Different countries, organizations, and researchers continue to use different names to describe these conditions.
Last updated: 7/19/2016