Skin lesion KOH exam: Uses, procedure, results, and other tests

Skin lesion KOH exam: Uses, procedure, results, and other tests

What to know about the KOH exam for fungal infections

By Nicole Galan

Reviewed by Daniel Murrell, MD

Last reviewed Mon 2 July 2018

The skin lesion KOH exam is a simple test that helps doctors identify fungal infections on a person's skin, hair, and nails.