--if responses to manual nerve testing (which includes pin prick, reflex, and in some cases, monofilament testing), or results on quantitative sensory or autonomic testing (i.e, sudomtor axon reflex test, sweat test, Valsalva maneuver, tilt table) are abnormal. Admittedly, with some of this, one relies on the patient's reports in the absence of "harder, more objective" results.

Then, too, some docs won't give the diagnosis without such "harder, more objective" results.