Learnderm.org does not support your web browser (Internet Explorer 7 and below). Please upgrade or use a different browser.
A hardened layer that results when serum, blood, or purulent exudate dries on the skin surface. Crusts may be thin or thick and can have varying color.
Crusts are yellow-brown when formed from serum, green or yellow-green when formed from purulent exudate, or red-black when formed by blood.
Thick brown crusted plaques and erosions in a child with impetiginized atopic dermatitis
Lip mucosal hemorrhagic crust in herpes simplex virus
Crust and exudative weeping in impetigo
Adherent honey-colored crust in impetigo