Estradiol and Testosterone - testing

Low testosterone has been linked to chronic fatigue in men and Nancy Klimas's modeling efforts suggest that the protective role that testosterone may be one reason why more women than men come down with chronic fatigue syndrome (ME/CFS). Athletes who come down with overtraining syndrome tend to have low testosterone (and other hormone levels.)

Low testosterone has also been associated with increased pain in fibromyalgia. Some doctors are even prescribing testosterone for their female FM patients.

Check out a nice basic overview of testosterone testing from Testing.com. It focuses quite a bit on erectile dysfunction but the basics of the testing still apply.

This is a test any doctor can order.