I just read an article that says there are researchers who may have developed a blood test for fibromyalgia. The blood test can indicate whether you have osteoarthritis, rheumatoid arthritis, or fibromyalgia. All three have similarities, but in the fibromyalgia patients, the blood showed differences in the way trytophan was processed.
Here is a link to the article: Simple Blood Test for Fibromyalgia?
Here is a link to the article: Simple Blood Test for Fibromyalgia?