Clinically, approximately 95% of acne patients will develop acne scarring. Ice chisel-like and atrophic scarring predominates on the face, atrophic scarring on the trunk, and hyperplastic scarring on the extremities and neck. The grading of acne scarring is also important for evaluating the severity of acne. To date, there is no uniform grading standard. The more commonly used grading method is: acne scar overall grading method.
Grade 1: patchy scarring. Grade 2: Mild atrophic or hyperplastic scar, which cannot be observed at normal social distance (50 cm or more) and can be covered by cosmetics or hair; Grade 3: Moderate atrophic or hyperplastic scar, which can be observed at normal social distance and cannot be covered by cosmetics or hair, and can be flattened by manual traction; Grade 4: Severe atrophic or hyperplastic scar, which can be observed at normal social distance and cannot be covered by hair can be observed at a social distance, cannot be covered by cosmetics or by hair, and cannot be flattened by manual traction.