[Contact dermatitis caused by 2-chloroacetophenone following tear gas exposure].

We report a case of acute contact dermatitis caused by exposure to 2-chloracetophenone tear gas in the face. Within 3 days the contact dermatitis had disappeared without medical treatment, but 7 days after exposure, a scaly pruritic eruption developed at the site of the original exposure although no new contact with 2-chloracetophenone had taken place.