Clinical feature of the urticaria is characterised by sudden appearance on the certain positions of the body, scarlet or light yellow, enlarging and merging into stretches with scraching. The most common menifestations are burning heat, severe itching, fever, abdominal pain etc. It Is classified on the basis of the color. There are red and white urticaria in the classics of the Oriental medicine. Red urticaria is caused by warm-heat evil on the other hand white urticaria is caused by cold-wetness evil. It is advisable to follow the therapeutic principles of expelling warm-heat and cold-wetness evils, regulating yin-yang.