Tinea pedis may occur as any of 4 clinical forms or in combination: Chronic hyperkeratotic Chronic intertriginous Acute ulcerative Vesiculobullous Chronic hyperkeratotic tinea pedis due to Trichophyton rubrum causes a distinctive pattern of lesion, manifesting as scaling and thickening of the soles, which often extends beyond the plantar surface in a moccasin distribution.