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DERMATOLOGY :: Skin Injury

Burns

What are burns?

Burns are a type of injury caused by thermal, electrical, chemical, or electromagnetic energy. Most burn accidents occur at home.

An open flame is the leading cause of burn injury for adults, while scalding is the leading cause of burn injury for children. Both infants and the elderly are at the greatest risk for burn injury.

What are the different types of burns?

A burn injury usually results from an energy transfer to the body. There are many types of burns caused by thermal, radiation, chemical, or electrical contact.

  • thermal burns - burns due to external heat sources which raise the temperature of the skin and tissues and cause tissue cell death or charring. Hot metals, scalding liquids, steam, and flames, when coming in contact with the skin, can cause thermal burns.
  • radiation burns - burns due to prolonged exposure to ultraviolet rays of the sun, or to other sources of radiation such as x-ray.
  • chemical burns - burns due to strong acids, alkalies, detergents, or solvents coming into contact with the skin and/or eyes.
  • electrical burns - burns from electrical current, either alternating current (AC) or direct current (DC).

How are burns classified?

Burns are classified as first, second, or third-degree depending on how deep and severe they penetrate the skin's surface.

Anatomy of the skin
Click Image to Enlarge
  • First-degree (superficial) burns
    First-degree burns affect only the epidermis, or outer layer of skin. The burn site is red, painful, dry, and with no blisters. Mild sunburn is an example. Long-term tissue damage is rare and usually consists of an increase or decrease in the skin color.
  • Second-degree (partial thickness) burns
    Second-degree burns involve the epidermis and part of the dermis layer of skin. The burn site appears red, blistered, and may be swollen and painful.
  • Third-degree (full thickness) burns
    Third-degree burns destroy the epidermis and dermis. Third-degree burns may also damage the underlying bones, muscles, and tendons. The burn site appears white or charred. There is no sensation in the area since the nerve endings are destroyed.

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Online Resources of Dermatology

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It is important to remember the health information found on this website is for reference only not intended to replace the advice and guidance of your healthcare provider. Always seek the advice of your physician with any questions you may have regarding a medical condition. If you think you may have a medical emergency, call your physician or 911 immediately.
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