Chinese herbal fumigation therapy has a history of more than 1000 years and was first created by Zhang Miao in the Western Jin Dynasty for the treatment of typhoid fever without sweat. Nowadays, whole-body fumigation therapy is mainly used to treat chronic urticaria, pityriasis rosea, psoriasis and other dermatological diseases. Chinese medicine vapor therapy is also called Chinese medicine vapor bath fumigation, which is heated by the evaporator of the instrument, so that the liquid medicine is transformed into vapor to penetrate into the skin and acupuncture points of the whole body for absorption, promote metabolism, achieve the efficacy of dispelling evil and remitting paralysis, activating blood circulation, anti-inflammation and relieving itch, and support the root, so as to achieve the purpose of treating skin disorders. Chronic urticaria is a common allergic disease of the skin and mucous membranes, the main symptom is episodes of skin flushing or puffiness, varying in size, pale or bright red in color, characterized by recurrent episodes and a prolonged course of the disease, which can last from several months to several years. The combination of heat and herbal medicine produces a large amount of vapor on the skin, while the decoction of the drug produces a large amount of Chinese medicine ions, causing the expansion of skin capillaries, accelerating blood circulation, accelerating tissue regeneration and cellular vitality, promoting the discharge of histamine-like substances, the active ingredients of the drug through the skin, orifices deep couples, dredging sweat holes, so as to achieve the purpose of expelling wind and cold, dredging stagnation, dispelling wind and relieving itching. Through herbal fumigation and other drug treatment, the symptoms of the disease can be effectively controlled and recurrence can be reduced. Contraindications: 1. certain systemic diseases, such as diabetes, hypertension, etc.; 2. psychiatric patients; women during pregnancy or lactation; 3. local skin infections; 4. artificial urticaria, cholinergic urticaria and skin scratching.