Atrophic Scars – such as Ice pick, Boxcar, Rolling scars. These are caused by collagen loss beneath the skin. Hypertrophic Scars – raised scars due to excess collagen, often following more severe acne. Post-Inflammatory Erythema (PIE) – red or dark spots left behind after pimples. Easier to treat among scar types. https://www.drdivyasharma.com/Acne-Scar-Treatment-in-bangalore/