Masks trigger facial seborrheic dermatitis and psoriasis: evidence from a multicenter, case-control study during COVID-19 pandemic

BACKGROUND: Wearing masks is an optimal preventive strategy during COVID-19 pandemic, but it may increase facial sebum production. However, few case reports have described seborrheic dermatitis (SeBD) and psoriasis (PsO) flares due to masks. Hence, we conducted a mul-ticenter study to clarify the possibility of increased SeBD and PsO flares in association with mask wearing during the COVID-19 pandemic.METHODS: This multicenter study enrolled patients with a diagnosis of facial SeBD and PsO. All dermatological consultations were conducted in teledermatology at baseline (T0) and after 1 month (T1) Of >6 hours/day wearing mask. PsO patients were assessed using PsO Area and Severity Index (PASI) and self-administered PASI (SAPASI), whilst SeBD patients with symptom scale of seborrheic dermatitis' (SSSD) and seborrheic dermatitis area and severity index (SEDASI).RESULTS: A total of 33 (20 males, 13 females, average age 43.61 +/- 9.86) patients with PsO and 33 (20 males, 13 females, average age 44.00 +/- 8.58) with SeBD were enrolled. After 1 month, PsO patients displayed higher values of both PASI and SAPASI (P<0.0001), while SeBD patients experienced a flare, as testified by the increment of both SSSD and SEDASI (P<0.0001). Mask type did not seem to influence the flare severity.CONCLUSIONS: Masks remain an optimal preventive strategy during COVID-19 pandemic, but patients with PsO and SeBD may experience facial flares. Thus, therapeutic approach should be more aggressive in these groups of patients to counteract the triggering effect of masks.