A 4-year-old girl presented with an extremely pruritic, painful, bullous, linear lesion on the plantar surface of her left foot (Figure 1and Figure 2). The eruption started during a 3-week trip to Pipa (in northeastern Brazil), where she had been visiting her father. She was treated with a 5-day course of topical mupirocin and oral amoxicillin–clavulanic acid, without improvement. The cytologic study performed with liquid extracted from the bullae showed a mixture of inflammatory cells with a predominance of eosinophils.