Fissure - Sharply-defined, linear or wedge-shaped tears in the epidermis with abrupt walls.

Erosion - Loss of superficial layers of upper epidermis by wearing away as from friction or pressure.

Ulcer - A localized defect in the skin of irregular size and shape where epidermis and some dermis have been lost.

Stage 1 ulcer - Skin is intact but has evolved- so this is still a secondary lesion- lighter skin will blanch at this point. (NEEDs intervention STAT)

Stage 2 Pressure ulcer - loss of epidermis/dermis-could look like a shallow abrasion

Stage 3 pressure ulcer - goes all the way into sub q tissue

Stage 4 pressure ulcer - involves all skin layers and goes into muscle, bone, tendon

Excoriation - Skin abrasions, usually superficial, due to scratching of the skin.

Scar - A mark on the skin that is left after a cut or other wound has healed