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Dermatitis produced by cosmetics through direct contact is becoming a more frequently established and recognized condition, but the specific agent responsible for this eruption has to be ferreted out of an almost endless number of these so-called beautifying preparations.
As the eruption may develop either immediately after the use of a new preparation as a result of specific hypersensitivity or of chemical irritation, or only after a long period of use, as a result of sensibilization, created through frequent and constant use, difficulty arises in finding the cause. A subconscious defensive attitude on the part of the patient when the subject of cosmetics is broached adds further hindrance.
It may be profitable to mention what arouses one's suspicion of a dermatitis produced by contact with cosmetics:
Location of the eruption.
Intense subjective symptoms (burning and itching).
Type of skin eruption.
These points need further elucidation:
HOLLANDER L. DERMATITIS PRODUCED BY COSMETICS (LA GERARDINE). JAMA. 1933;101(4):259-261. doi:10.1001/jama.1933.02740290007003