Dignose the case with the given clinical presentation.
dermatographia and a really hard slap?
Dermographism, increased IgE causes mast cells to release histamines. It is not curable you can only give patient steroids or receptor blockers. The disease occurs because of the psychological stress and the prevelance is between age of 15~20.
Hands down the easiest diagnosis this
Ouch someone slapped the hell out of him