Burn Injury - Depth and Grading Degrees Superficial thickness (first degree): • Painful, Does not blister, Does not scar Partial or intermediate thickness (second degree): • Blisters and weeps, With increasing depth, increased risk of infection, With increasing depth, increased risk of scarring • Superficial partial thickness burns do not require surgery, but may scar and be more painful • Deep partial thickness burns require surgery and form more scars and are less painful Full thickness (third degree): • Dry; Insensate to light touch and pin prick; Small areas will heal with substantial scar or contracture; Large areas require skin grafting; High risk of infection Fourth degree: • Involves muscle or bone; Leads to loss of the burned part doi: 10.1038/s41572-020-0145-5 #Burn #Depth #Grading #Degrees #classification #diagnosis