蕁麻疹是一種本虛標實的病證，現代醫學擅長於標實證的治療，中醫則擅長於本虛 證或本虛標實證的治療。本跟診病例男性57 歲，慢性蕁麻疹反覆發作多年，因肺衛虛不 固，風邪易入侵皮膚引起風疹塊，風疹瘙癢，面紅，流汗，口乾，其主要病機為肝經風熱， 治則以疏風散邪，養陰清熱，瀉火解毒，方用消風散合黃連解毒湯，加天花粉，知母或 麥冬，後以溫清飲合消風散治療，追蹤蕁麻疹未再發作，但不能謂為治癒，因其本虛之 證並未調治，將來勢必有再復發的機率。

Urticaria is a disease pattern of root vacuity and tip repletion. Modern medicine is expert in treatment for tip repletion pattern. Chinese medicine is expert in treated root vacuity pattern or root vacuity and tip repletion pattern. The with diagnosed case male fifty seven years was a chronic urticarial recurrent attack for many years. The chronic urticarial cause of lung-defense vacuity, so wind evil easily invaded skin and induced wind wheals, itchy wind papules, face reddish, sweating and dry mouth. The pathological mechanism of chronic urticarial was liver channel wind-heat. The principle treatment of chronic urticarial governs course wind and dissipate evil, nourish yin and clear heat, as well as drain fire and resolve toxin. The prescriptions were used Wind-Dispersing Powder and Coptis Toxin-Resolving Decoction, adding trichosanthes root, anemarrhena or ophiopogon. After treatment with Warm Clearing Beverage and Wind-Dispersing Powder, the patient’s urticarial lesion was not recurrence, but not complete remission. Because of his root vacuity pattern was not received therapy, the future should be have chances of recurrent attack.