In most cases, your doctor can
athlete's foot (tinea pedis) by looking at your foot.
He or she will also ask about your symptoms and any previous
fungal infections you have had.
symptoms look unusual or if a previous infection has not responded well to
treatment, your doctor may collect a skin or nail sample by lightly scratching
the skin with a blade or the edge of a microscope slide, or by trimming a nail.
He or she will examine the skin and nail samples using laboratory tests