Sudden debilitating fatigue of unknown cause. It may follow a nonspecific illness with mild fever, tender lymph nodes, sore throat, headaches, weakness, muscle and joint pain, and confusion or difficulty in concentrating. To meet the criteria of CFS, the syndrome must be new, with a definite point of onset, and must persist more than six months. Once dismissed as imaginary, CFS remains controversial. Many authorities question whether it is a distinct disorder, since there is considerable overlap with other conditions such as fibromyalgia and Gulf War syndrome. No diagnostic test for CFS exists. Although a number of theories about the cause of CFS have been advanced, none has been proved. No cure has been found, but most patients improve gradually.
Learn more about chronic fatigue syndrome (CFS) with a free trial on Britannica.com.
Chronic may refer to:
Chronic Diseases Make for a Perfect Storm; Mental Health and Substance Use Care Providers Have a Role in Combating Them
Oct 01, 2008; The premature death of public mental health clients is caused principally by untreated Chronic diseases. Hence, it is...