Chronic fatigue, sometimes called Chronic Fatigue Syndrome (CFS), is a complex disorder in which one may experience extreme fatigue that does not improve with rest and could worsen through activity. Although the cause is unknown, the syndrome may stem from viral infections, immune impairment, abnormal blood pressure, hormonal imbalance, or even prolonged stress.
Chronic fatigue cannot be tested but is characterized by permanent fatigue, memory loss, muscular discomfort, inexplicable headaches, sore throat, enlarged lymph nodes, and active joint pain without swelling. While possible at any age, the syndrome is most common in one’s 40s and 50s. Chronic fatigue may complicate one’s daily routine and eventually cause social isolation.