To detect the nerve disorder, I had a Thermoregulatory Sweat
Test,
and an Autonomic Reflex
Test which included a quantitative sudomotor axon reflex test, to diagnose damage to the small nerve fibers. They also did a Brainstem Evoked Potential, Sensory Evoked Potential, and an EMG to check some of the other nerve fibers . . . what fun!