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Dried exudate from a lesion on the skin
Crust or Scab
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A split in the epidermis extending into the dermis
Fissure
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To scratch or rub off the skin
Excoriate
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A substance such as a conterirritant, which when apllied to the skin causes erythema
Rubefacient
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Same as vesicle, but bigger. Diameter greater than 1cm
Blister or bulla
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A sharply circumscribed elevated lesion containing fluid up to 1cm
Vesicle
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Dead cells caused by severe trauma or infection
Necrosis
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Eruption of itching wheals, usually of systemic origin; may be due to state of hypersensitivity
Urticaria aka hives
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Thickening & hardening of skin into an irregular plaque due to excessive rubbing or scratching
Lichenification
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Flat discolored lesion less than 1 cm in diameter
Macule
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Same as macules (flat discolored lesions) but larger than 1cm
Patches
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An erosion of the epidermis exposing the dermis
Ulcer
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A solid, circumscribed, elevated lesion < 1cm in diameter
Papule
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A palpable, papular, relatively flat lesion more than 1 cm in diameter
Plaque
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Circumscribed, elevated lesion < 1cm containing pus. (Larger lesion termed “abcess”/ “furuncle”)
Pustule
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Accumulation of loose, desquamated, hyperkeratitic epidermal cells
Scale
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