WHAT IS IT? Chronic Fatigue and Immune Dysfunction Syndrome (CFIDS) is a condition of prolonged and severe fatigue that is not alleviated by rest and not directly caused by other conditions.

WHAT CAUSES IT? The exact cause isn’t known but some researchers believe a virus could be to blame, but unfortunately no distinct virus has ever been identified. Other research suggests the cause is an inflammation of pathways in the nervous system and that this inflammation may be an immune response. Other factors that doctors consider is age, prior illness, stress, environment or family medical history. WHO GETS IT? It is most common in women ages 30 to 50.

SYMPTOMS Fatigue never experienced to this extent before, lasting at least six months, and not helped by bed rest.

This fatigue restricts activity.

Low-grade fever of 101 degrees or less

Sore throat Tenderness in lymph nodes

Muscle weakness and aches

Joint pain

Severe headaches

Other symptoms can include depression, difficulty concentrating and forgetfulness.

Source: Yahoo.com