Pressure urticaria
Encyclopedia
Pressure urticaria is a physical urticaria
Physical urticaria
Physical urticarias represent a distinct subgroup of the urticarias that are induced by an exogenous physical stimulus rather than occurring spontaneously.The most common form of physical urticaria is dermatographism....

caused by pressure applied to the skin, and is characterized by the development of swelling and pain that usually occurs 3 to 12 hours after local pressure has been applied.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK