What is the X in X-mas?
impetigo im·pe·ti·go (ĭm'pĭ-tī'gō)
n. pl. im·pe·ti·gos
A contagious skin infection caused by staphylococcal or streptococcal bacteria and characterized by the eruption of superficial pustules that rupture and form thick yellow crusts, usually on the face; it is most commonly seen in children. Also called impetigo contagiosa, impetigo vulgaris.