Unmasking symptomatic dermatographism in the time of COVID-19.

A 39-year-old woman presented with localized urticaria following N95 respirator use in a COVID-19 unit. After approximately 15 minutes of wear, she developed pruritus on her face, without associated angioedema or dyspnea. She had no history of cutaneous reactions to N95 respirators. Physical examination revealed several wheals with surrounding erythema limited to the area occluded by the N95 respirator (figure 1). On evaluation, firm stroking of the volar aspect of her forearm produced linear wheals (figure 2); she was subsequently diagnosed with dermatographism. Symptoms resolved within 1 …