Acne scars are permanent textural changes and indentations that may occur as a result of severe acne. If acne is left untreated, it will lead to scarring and can form as pigmentation or dark spots which are more difficult to treat in the long term. When acne occurs, large pus-filled spaces known as the cysts form, destroy the surrounding skin tissue and hinder the healing process. Once the cyst empties the area, allowing it to heal, it leaves behind a scar on the face.
The term “scarring” is not used for the temporary red and brown marks left early after acne has occurred, as these marks will almost always improve without treatment.