There are different types of scars, each with defining characteristics.
Atrophic scars are characterized by the loss of tissue. They appear depressed, serrated, or flat against the upper layer of the skin. Often atrophic scars have darker skin pigmentation than other area of your skin. Examples of atrophic scars include acne scars and chickenpox scars.
Hypertrophic scars are characterized by excess tissue that forms over the skin as it heals. Unlike a keloid scar, it does not grow outside the injured area. Hypertrophic scars are commonly darker than other skin in the area.
Keloid scars are the result of aggressive healing and an overproduction of tissue. They are characterized by a raised, thick, puffy appearance. They are typically darker than the surrounding skin. Unlike a hypertrophic scar, keloid scars can grow beyond the injured area.
Contracture scars result from large areas of skin being lost or damaged, typically from burns. They are characterized by tight, shiny skin that can restrict movement.
Dermabrasion is one of the most effective and most popular methods for treating facial scars. Unlike microdermabrasion kits you can buy at the drugstore, dermabrasion is performed by a dermatologist. They use a wire brush or a wheel to exfoliate the top layer of skin on your face.
Chemical peels contain mild acids that are applied in a single layer on the skin. As a result, the upper layer of skin (epidermis) exfoliates and rolls off, exposing a new layer of skin.
Laser resurfacing has the same goal as chemical peels and dermabrasion: to remove the top layer of skin. Unlike acids and tools, laser resurfacing uses high-powered laser beams for skin removal.