A 39‐year‐old woman presented to our emergency department for evaluation of facial and scalp rashes. The symptom onset began several weeks ago after she applied a permanent hair‐dying product. Examination of the skin revealed a primary macular rash with scattered crusted papules, superficial ulcerations, and bland erythema distributed in the periorbital tissues, hairline, scalp, ears, neck, and upper chest (Figure 1). Areas of alopecia had formed as well. Pertinent laboratory values included a white blood cell (WBC) count of 6.5 Kg/mm3 with 1.2 Kg/mm3 eosinophils.