Association of Perioral Dermatitis with Facial Mask Usage during the COVID-19 Pandemic: A Retrospective Study

Supplemental Figure 1. Rate of encounters of perioral dermatitis by year and month Supplemental Figure 2. Rate of encounters of perioral dermatitis mentioning mask usage by year and month补充图1：按年月统计的口周皮炎（perioral dermatitis）就诊率 补充图2：按年月统计的提及口罩使用情况的口周皮炎就诊率