Urticaria is a very common allergic skin disease, with 15-20% of people having at least one attack in their lifetime. The main manifestation of urticaria is the appearance of wind clusters on the skin and mucous touch, which are bright red or pale, skin-colored, or in a few cases, only edematous erythema. The size and shape of the cluster varies, and can be round, oval, or irregularly shaped like a cloud, and a single cluster can last from a few minutes to a few hours, usually no more than a day, and leaves no trace after fading. However, the rash occurs repeatedly or in batches, one after the other. It occurs more often at night. Some patients may have nausea, vomiting, abdominal pain, chest tightness, and breath-holding, which are common in those with acute attacks. The duration of urticaria varies from one day to the next, but there is a possibility that the disease will reoccur in the future; in the long run, the disease can occur frequently or even daily, lasting weeks, months, years or even decades. If the rash is very light, the itching is not obvious and does not affect life, it can be left untreated; if the rash is severe, the itching is intense and affects life and workers, symptomatic treatment is needed. The total cause of urticaria, according to Chinese medicine, is due to a lack of innate endowment, lack of solidity outside the guard, and the invasion of wind evil. The specific categories are: 1, the external wind and cold evil, guest in the muscle surface, resulting in the loss of the external guard; 2, wind-heat external attack, accumulated in the skin, resulting in the Ying Wei disharmony; 3, the diet is not disciplined, over-eating spicy fat, or intestinal parasites, so that the gastrointestinal heat; 4, the body qi and blood deficiency, the disease for a long time qi and blood depletion, blood deficiency to produce wind, qi deficiency outside the guard does not care, wind evil to take advantage of the deficiency; 5, internal injury to the emotions, Chong Ren is not regulated, liver and kidney deficiency The skin is not nourished, the wind and dryness are generated and blocked in the skin. Modern medicine believes that the causative factors of urticaria are: 1, inhalants: pollen, animal dander, smoke, fungal spores, volatile substances; 2, food: such as fish, shrimp, eggs, milk and other protein foods; 3, drugs: such as antibacterial drugs, foreign serum, blood transfusions, penicillin, dysentery, etc.; 4, infection: parasites, bacteria (tonsillitis, etc.), viruses (hepatitis), fungi (skin fungal disease) 5, physical factors: such as sunlight, cold, heat and humidity; 6, mental factors: mental tension or excitement, after exercise; 7, other: insect bites, plants, nettles, poison ivy, internal diseases.