Dermografism, Urticaria Factitia

Dermografism, urticaria factitia.Dermographism, urticaria factitia, is a condition of unknown aetiology, a subtype of physical urticaria, in which mechanical irritation of the skin leads to a hives in the contact area within minutes. The symptom responds fairly well to antihistamines.

Picture and text: Raimo Suhonen