It is made up of an outer, dead portion and a deeper, living portion. It contains the nerves and nerve endings, blood vessels, glands, and hair follicles. Burns are classified as first, second, or third degree depending on their depth. First degree - affects only the epidermis layer of skin. The burn site appears red, painful, dry, and absent of blisters.
Mild sunburn is an example.
Second degree - involves the epidermis layer and part of the dermis layer of skin. The burn site appears red, blistered, and painful, and swelling may be present. Third degree - destroys the epidermis and dermis. It may also damage the underlying bones, muscles, and tendons. The burn site appears white or charred black.