Summary of case history ,Mr. CHEN, male, 63 years old, for more than 2 months, the whole body has developed large edematous erythema, sweating and wet clothes at the beginning, fever in hands and feet, 1 line of stools a day, sticky toilet, pale red tongue with thin white coating, slow pulse.,TCM diagnosis ,Urticaria (interior retention of damp-heat, exterior attack of wind-heat),Western medicine diagnosis ,Urticarial vasculitis,Therapeutic methods ,Oral Silkworm Sand Drink and Yinqiao Powder for more than 1 month. The formula consists of Schizonepeta tenuifolia 10 g, mint 8 g, bamboo leaf 10 g, honeysuckle 30 g, forsythia 15 g, scutellaria baicalensis 15 g, salvia miltiorrhiza 30 g, raw gypsum 30 g, white mulberry root-bark 15 g, silkworm excrement 30 g (decoction), manyleaf paris rhizome 20 g, periostracum cicadae 15 g, bombyx batryticatus 15 g, achene of great burdock 15 g, platycodon grandiflorum 10 g, rhizoma phragmitis 20 g, fermented soybean 15 g, ural licorice roots 6 g. The whole prescription focuses on the use of wind herbs, which can be used to promote the pathogens that invade the lung and Wei, and to dissipate the dampness and heat trapped in the spleen.,Clinical outcomes ,The patient's symptoms improved and the quality of life improved significantly.