A case of allergic contact dermatitis to a new nail hardening formula put out by a well-known cosmetic firm is reported. This caused a subacute paronychia, onycholysis, and onychomadesis. Regrowth of the nails occurred normally after a topical steroid ointment was applied. Patch tests with the preparation confirmed the diagnosis.
MARCH CH. Allergic Contact Dermatitis to a New Formula to Strengthen Nails. Arch Dermatol. 1966;93(6):720. doi:10.1001/archderm.1966.01600240086016
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