A crust that forms on the skin or on a mucous membrane at the site of a healing wound or infected area.
The crust which forms on super?cial injured areas. It is composed of FIBRIN, which is exuded from the raw surface, together with blood corpuscles and epithelial cells entangled in its meshes. Healing takes place naturally under this protection, and the scab dries up and falls o? when healing is complete. Scabs appearing on the face without any previous abrasion are usually caused by an infection (see IMPETIGO).
n. a hard crust of dried blood, serum, or pus that develops during the body’s wound-healing process over a sore, cut, or scratch.
A severe form of scabies presenting often in immunosuppressed individuals, often presenting with a generalised dermatitis, extensive scaling and occasionally vesiculation and crusting. The severe itch may be reduced or absent. Secondary infection can develop. See also Scabies.... norwegian scabies
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