Pop Quiz #140
The correct answer is A. Allergic contact dermatitis to a soap or other topical application.
The sharp demarcation and linear almost “dripping” of the proximal aspect of the dermatitis suggest an allergic contact dermatitis particularly to a topical application. Often stronger steroids than a 1% hydrocortisone are needed.
Irritant contact dermatitis is less pruritic, and less well-d …