Burns are classified as first, second, or third-degree depending on how deep and severe they penetrate the skin's surface. The burn site is red, painful, dry, and absent of blisters.
Mild sunburn is an example.
Scarring does not occur. The burn site appears red, blistered, and painful, with possible swelling, and may be moist. 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.