Two independent dermatologists, blinded to the group of treatment which each patient belongs to, will apply the Quantitative Global Grading System for Postacne Scarring before treatment, two months and six months after treatment. There are no clinical signs or characteristics that enable the evaluators to identify which group each patient is allocated and patients will be instructed to not provide this information. Six months after completion of treatment, patients will answer a questionnaire to assess their perceptions of the degree of improvement of their scars, pain during treatment and recovery time, assigning values from 0 to 10, where 0 means maximum dissatisfaction and 10, maximum satisfaction.