A skin and integumentary tissue symptom that is characterized by raised red skin wheals (welts) commonly caused by an allergic reaction with wheals that may vary in size from about 5 mm (0.2 inches) in diameter to the size of a dinner plate that are described as severely itchy a stingnig or burning sensation, and having a pale border. [ url:http://en.wikipedia.org/wiki/Urticaria ]