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Burns that affect only the superficial skin layers are known as superficial or first-degree burns. [2] [11] They appear red without blisters, and pain typically lasts around three days. [2] [11] When the injury extends into some of the underlying skin layer, it is a partial-thickness or second-degree burn. [2]
An abrasion is a partial thickness wound caused by damage to the skin. [1] It can be superficial involving only the epidermis to deep, involving the deep dermis. Abrasions usually involve minimal bleeding. [2]
When the extracellular matrix senses elevated mechanical stress loading, tissue will scar, [18] and scars can be limited by stress shielding wounds. [18] Small full thickness wounds under 2mm reepithelize fast and heal scar free. [19] [20] Deep second-degree burns heal with scarring and hair loss. [2]
A wound is any disruption of or damage to living tissue, such as skin, mucous membranes, or organs. [1] [2] Wounds can either be the sudden result of direct trauma (mechanical, thermal, chemical), or can develop slowly over time due to underlying disease processes such as diabetes mellitus, venous/arterial insufficiency, or immunologic disease. [3]
Timing is important to wound healing. Critically, the timing of wound re-epithelialization can decide the outcome of the healing. [11] If the epithelization of tissue over a denuded area is slow, a scar will form over many weeks, or months; [12] [13] If the epithelization of a wounded area is fast, the healing will result in regeneration.
Full-thickness: Involves excising a defined area of skin, with a depth of excision down to the fat. The full thickness portion of skin is then placed at the recipient site. A full-thickness skin graft is more risky, in terms of the body accepting the skin, yet it leaves only a scar line on the donor section, similar to a Cesarean-section scar.
In rock climbing, a "flapper" is an injury in which parts of the skin are torn off, resulting in a loose flap of skin on the fingers. [3] This is usually the result of friction forces between the climber's fingers and the holds, arising when the climber slips off a hold.
Wound care and functional outcomes can be predicted from the initial assessment of wound depth and location. Epidermal and partial thickness wounds heal in 1 to 3 weeks through epithelial migration from the wound edges and epithelial budding from the appendages of the sweat and hair glands.