Can Fibromyalgia be diagnosed by a blood test?

The simple answer is the accurate one: no.

It all begins with the fibromyalgia trigger points map which you may have already seen on the website.

If you are asking because the doctor has taken some blood for testing, it'll be because they like to eliminate other causes of pain, like rheumatoid arthritis, before they decide on a diagnosis of fibromyalgia.

Best wishes

Earle