Table 1. Qualitative Global Acne Scarring Grading System

Grade	Level	Clinical Features
1	Macular	These scars can be erythematous, hyper- or hypopigmented flat marks. They do not represent a problem of contour like other scar grades but of color.
2	Mild	Mild atrophy or hypertrophy scars that may not be obvious at social distances of 50㎝ or greater and may be covered adequately by makeup or the normal shadow of shaved beard hair in men or normal body hair if extra facial.
3	Moderate	Moderate atrophic or hypertrophic scarring that is obvious at social distances of 50㎝ or greater and is not covered easily by makeup or the normal shadow of shaved beard hair in men or body hair if extrafacial, but is still able to be flattened by manual stretching of the skin(if atrophic).It equates to the rolling and shallow box car atrophic-type, scars and the moderate hypertrophic and keloidal scars.
4	Severe	Severe atrophic or hypertrophic scarring that is evident at social distances greater than 50㎝ and is not covered easily by makeup or the normal shadow of shaved beard hair in men or body hair if extrafacial and is not able to be flattened by manual stretching of the skin.This group comprises punched out atrophic(deep 'box car'), 'ice pick' scar, bridges and tunnels, marked atrophy, dystrophic scars and significant hypertrophy or keloid.