Acne scars are marks left on the skin after acne lesions heal. They can vary in appearance, including indentations, raised areas, or discoloration. The severity and type of scarring depend on factors such as the type of acne, skin type, and how the acne was treated. There are two main types of acne scars: atrophic scars, which are depressions in the skin, and hypertrophic scars, which are raised. Treatments for acne scars include topical creams, laser therapy, and dermal fillers, aimed at improving skin texture and appearance.