In autoimmune diseases – immune system dysfunction – the body gets confused. In chronic fatigue/fibromyalgia, the immune system is weak and can't mount much of an attack against invaders
well fibromyalgia may be associated with other autoimmune diseases.Fibromyalgia has symptoms that resemble those of some rheumatic illnesses, including rheumatoid arthritis and lupus (systemic lupus erythematosus). These are autoimmune diseases in which a defective immune system mistakenly attacks the body's own healthy tissue, producing inflammation and damage. The pain in fibromyalgia, however, does not appear to be due to autoimmune factors, and there is little evidence to support a role for an inflammatory response in fibromyalgia.