Urticaria refers to a group of disorders affecting adults and children,
in which red patches and weals occur in the skin. The release of
chemicals such as histamine from mast cells in the skin causes small
blood vessels to leak and results in tissue swelling.
Ddisorders affecting Adults and Children <http://www.herbaltreatmentinfo.com/urticuria_info.html> <http://www.herbaltreatmentinfo.com/urticuria_info.html> ...