extreme caution must be used to prevent ulceration, lest scars be left which would be far more disfiguring than the nævus itself. With children old enough to bear a little pain without crying, the pigmented spots may be blistered by touching them with the point of the electrolytic needle or by passing it superficially through the epidermis.
In nævi of small or moderate size covered with coarse hair
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Fig. 30.
the electrolytic needle may be used, as in the treatment of hypertrichosis, and a fine result attained through patience and perseverance. In the Journal of Cutaneous Diseases for May, 1893, the writer has reported a case of extensive hairy and verrucous nævus involving the right cheek and lower eyelid, which was completely removed by means of electrolysis. The treatment consisted in carefully passing a fine, flexible steel
