The study will test the subject questionnaire aimed to be used in a full general population prevalence study to screen potential subjects with rosacea.~Questionnaire will be self-administrated to Dermatology outpatients.~Testing will be performed at the practice of 2 Dermatologists experts in rosacea who will evaluate subjects' answers and propose fine-tuning of the questionnaire content, if needed.
The purpose of this study is to test and refine, a subject questionnaire aimed to be used in a general population rosacea prevalence study.