First degree Epidermis Redness (erythema). Dry Painful 1wk or less. Second degree (superficial partial thickness) Extends into superficial (papillary) dermis Red with clear blister. Blanches with pressure Moist Painful 2-3wks. Second degree (deep partial thickness) Extends into deep (reticular) dermis Red-and-white with broken blisters. Less blanching. Moist Painful Weeks - may progress to third degree. Scarring, contractures (may require skin grafting).
Third degree (full thickness) Extends through entire dermis Stiff and white/brown Dry, leathery Painless Requires excision Scarring, contractures, Fourth degree Extends through skin, subcutaneous tissue and into underlying muscle and bone. Black; charred with eschar Dry Painless significant functional impairment, possible gangrene, and in some cases death
http://en.wikipedia.org/wiki/Burn
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