Abstract
Hair dyes have been used by man since ancient times. However, the recent popularization of hair dyeing has greatly broadened this field of cosmetology. Up-to-date home hair dyes and practically all the beauty-parlor hair-dye preparations1 are of the so-called oxidation or penetration type of hair coloring. This hair dye is basically a solution of p-phenylenediamine. I am reporting three cases of cutaneous irritation of the scalp from the use of an oxidation type of hair dye. Although untoward reactions are apparently not numerous, the occasional occurrence of a severe reaction justifies the report of the following cases. REPORT OF CASES In two of the three cases herein reported the hair coloring was applied at beauty parlors, and in the third it was applied at home. Case 1.—M. S., a white woman aged 42, had one brand of an oxidation-type hair dye applied to her scalp at a local

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