2. Autoimmune Diseases
VeryWell.com says that fibromyalgia tends to mimic the symptoms of certain autoimmune diseases, while it can co-exist with autoimmune diseases (when cells attack your own healthy tissue).
While the disorder itself is not considered an autoimmune disorder currently, “It’s possible that future studies may discover that autoimmunity plays a part in some or all cases,” explains the site. It adds that while there’s research that shows some “irregularities” in the immune system of fibromyalgia patients, the disorder doesn’t present the same inflammation and damage that classified autoimmune diseases.