1) Superficial (first-degree) = Epidermis ~ presents
as red skin without blisters
2) Superficial partial thickness (second-degree) = Extends into superficial (papillary) dermis ~ Presents with redness with clear blister & blanches with pressure
3) Deep partial thickness (second-degree) = Extends into deep (reticular) dermis ~ presents as yellow or white skin with less blanching. May be blistering.
4) Full thickness (third-degree) = Extends through entire dermis ~ presents as stiff and white/brown skin. No blanching.
5) Fourth-degree = Extends through entire skin, and into underlying fat, muscle and bone ~ presents as black skin; charred with eschar