How is anhidrosis diagnosed?

How is anhidrosis diagnosed?

Your healthcare provider will ask you questions about your lack of ability to sweat. You may also be asked to undergo a sweat test. In this test, you are coated with a powder that changes color where you sweat. You are moved into a chamber to make you perspire to see which parts of your body sweat.

You may have a skin biopsy performed to look for nerve fiber damage to determine a possible cause of anhidrosis. You may have other tests to try to determine other underlying causes of your anhidrosis.