An<unk>  is a widespread rash, usually of viral origin, and usually occurring in children. It represents either a reaction to a toxin produced by the organism, damage to the skin by the organism or an immune response.<unk> s may also be due to a drug, most commonly antibiotics.
Historically, five "classical" childhood<unk> s have been recognized: they are rubeola (measles), varicella (chicken pox), rubella, scarlet fever and "fifth disease".  Roseola (aka<unk>  subitum or "sixth disease") was later added to these.  Vaccinations now exist against measles, rubella and chickenpox; scarlet fever is a streptococcal disease easily treated with antibiotics and the remaining two viral syndromes are considered benign.
A "new"<unk>  was identified in 1992, unilateral laterothoracic<unk>  (ULE), later also known as asymmetric periflexural<unk>  of childhood.
Exanthem
Jock itch
Blister
Yaws
Larva migrans
Erythroderma
Lesion
Eyelash