Total lesions will be defined as the sum of inflammatory lesions (papules and pustules), non-inflammatory lesions (whiteheads and blackheads) and other acne lesions (nodules).
The goal of this interventional, confirmatory and post market study is to evaluate the efficacy and clinical performance of Crystal Peel in adults suffering mild facial acne vulgaris. The principal and secondary aims are:~Principal aim: to evaluate the efficacy and clinical performance of Crystal Peel, a salicylic-based peel, for the treatment of acne by lesions counting (front, 2 cheeks, the chin above the jaw line (excluding the nose)) using both visual observation and palpation.~Secondary aims: pores and texture analysis, visual effect (Standardized anonymized photographs, investigator global assessment, patient global assessment, local and overall tolerance of the Crystal Peel, subject's self-evaluation and potential adverse events collection.~The primary endpoint of the study will be an objective counting of the acne lesions performed on every visit.