Definition an acute, self-limited skin disease characterized by the presence of rosy-coloured >round to oval macular lesions with a rim of fine scales appear most common in crops on the trunks and proximal extremities.• an acute, self-limited skin disease • characterized by the presence of ➢ rosy-coloured ➢round to oval macular lesions ➢ with a rim of fine scales • appear most common in crops on the trunks and proximal extremities. Definition