Picture of Ringworm of the Hand
Ringworm may involve the hands, particularly the palms and the spaces between the fingers. It typically causes thickening (hyperkeratosis) of these areas, often on only one hand. Tinea manus is a common companion of tinea pedis (ringworm of the feet). It is also called tinea manuum.
Ringworm Slideshow: Watch & Learn About Ringworm
Image Source: CDC
Text: WebMD Medical Reference From Healthwise: "Ringworm of the Skin - Topic Overview."