Jupitersterrain 5

A third-degree burn is referred to as a full thickness burn. This type of burn destroys the outer layer of skin , epidermis and the entire layer beneath or dermis

Electrical burns are caused by either an electric shock or an uncontrolled short circuit. Common occurrences of electrical burns include workplace injuries, taser wounds, or being defibrillated or cardioverted without a conductive gel. Lightning is also a rare cause of electrical burns

Since normal physiology involves a vast number of applications of electrical forces, ranging from neuromuscular signaling to coordination of wound healing, biological systems are very vulnerable to application of supraphysiologic electric fields. Some electrocutions produce no external burns at all, as very little current is required to cause fibrillation of the heart muscle. Therefore, even when the injury does not involve any visible tissue damage, electrical shock survivors may experience significant internal injury. The internal injuries sustained may be disproportionate to the size of the burns seen, and the extent of the damage is not always obvious 

The true incidence of electrical burn injury is unknown. High voltage electricity, is a common cause of third and fourth degree burns due to the extreme heat yielded by high temperature arcs and flashover associated with voltages over 1000v.Explosions caused by electrical faults produce high intensity Ultraviolet radiation which can also cause radiation burns

Scalding or calidus is caused by hot liquids gases or steam, most commonly occurring from exposure to high temperature tap water in baths or showers or spilled hot drinks. A blister is a "bubble" in the skin filled with serous fluid as part of the body's reaction to the heat and the subsequent inflammatory reaction. The blister "roof" is dead and the blister fluid contains inflammatory mediators. Scald burns are more common in children, especially "spill scalds" from hot drinks and bath water scalds

Generally scald burns are first or second degree burns, but third degree burns can result, especially with prolonged contact



http://www.chw.org/display/PPF/DocID/21911/router.asp 
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12.27, 19.08.12.