INTRODUCTION & OBJECTIVES: Scars are a frequent late complication of acne but the reason for their heterogeneity in terms of clinical manifestation and severity is still unclear. The aim of our study was to evaluate the factors that more frequently lead to post-acne scarring, atrophic or hypertrophic, as well. MATERIAL & METHODS: One hundred and fifty acne patients (60 males and 90 females) were included in this retrospective study. Post-acne scarring was correlated to age, gender, acne severity and duration, family history for acne. Statistical analysis was performed using Chi-squared test and setting P values for statistical significance as <0.05. RESULTS: Post-acne scars are more severe in males than in females, with grater prevalence in nodule-cystic acne. Duration of acne and familiarity are not significantly related to scarring. CONCLUSIONS: We observed that males and inflammatory forms of acne are more prone to scarring but, more interestingly, duration of acne doesn’t influence scar severity.