Also known as Myalgic Encephalomyelitis (ME), Chronic Fatigue Syndrome (CFS) still has no definite cause and can last for months and sometimes years. It can affect anyone and any age, but women aged 25-50 are affected the most. Some physicians still believe that the illness is psychosomatic – “it’s all in your head” . . . → Read More: Managing Chronic Fatigue Syndrome.