Chronic fatigue

Definition of chronic fatigue syndrome

chronic fatigue syndrome

(KRAH-nik fuh-TEEG SIN-drome)
A condition that lasts for more than 6 months in which a person feels tired most of the time. They may also have trouble concentrating and carrying out daily activities. Other symptoms include sore throat, fever, muscle weakness, headache, and joint pain. Also called CFS.

Source: NCI Dictionary of Cancer Terms