Acne scars

Acne scars are structural changes in the skin that occur when inflammatory acne damages collagen within the dermis. When inflammation is deep or prolonged, normal collagen remodeling is disrupted, leading to permanent depressions or uneven texture. The most common forms are atrophic scars, including icepick, boxcar, and rolling types. While redness and pigmentation may fade over time, true scar tissue does not resolve spontaneously. Effective management requires scar-type–specific strategies and controlled collagen remodeling over multiple sessions.

Acne scars result from dermal collagen damage after inflammation.
Atrophic scars (icepick, boxcar, rolling) are the most common types.
Pigment changes may improve, but structural scars persist.
Treatment must be tailored to scar depth and morphology.
Long-term collagen stimulation is essential for optimal improvement.