Chronic urticaria is a condition in which various factors cause temporary inflammatory congestion and tissue edema in the skin, mucous membranes, and blood vessels for more than 6 weeks. The cause is often uncertain. The clinical manifestations of urticaria are the erratic occurrence of wind and plaques on the trunk, face or extremities. The episodes vary from several times a day to once every few days. There are many causes of chronic urticaria, the main ones are: 1. Inhalants: such as pollen, animal dander, smoke, fungal spores and certain volatile substances, etc. 2. 2, food: such as fish, shrimp, eggs, milk, or other protein-rich foods. 3.Drugs: such as vaccines, heterologous serum, blood transfusion, penicillin, dysentery, aspirin, etc. 4, infection: parasites, bacteria (such as tonsillitis, paranasal sinusitis, chronic appendicitis, etc.), viruses (such as hepatitis, Coxsackie (Coxsackie) virus infection), fungi (such as dermatophytosis), etc. 5, physical factors: such as sunlight, cold, heat and humidity, etc. 6, mental factors: seen in mental tension or excitement, after exercise. 7, other: such as certain insect bites and stings, contact with certain plants and animals such as nettles, poison ivy, etc., as well as suffering from certain skin or systemic diseases such as mastocytosis, rheumatic fever, leukemia and certain endocrine diseases. To prevent and treat urticaria, it is important to identify and remove as many triggers as possible. For example, be careful not to inhale pollen, animal dander, feathers, dust, castor powder, avoid contact with allergens, prohibit or prohibit the consumption of certain drugs or food items to which the body is allergic, etc. If you have a relapse due to hot or cold stimulation, you should not avoid it too much, instead, you should gradually extend the time of hot and cold stimulation in order to adapt. Actively treat primary diseases, such as acute tonsillitis, cholecystitis, viral hepatitis, appendicitis, intestinal ascariasis, etc., to eliminate the source of the disease. Urticaria can be prevented and treated. Although the suspected causes of urticaria are numerous and complex, careful search for triggering factors, prohibition of allergenic drugs and short-term prohibition of suspected foods, active control of infection and treatment are the keys. The next step is to take anti-allergy medication internally and take appropriate vitamin C and calcium supplements to help the rash subside. If bacterial infection is combined, antibacterial agents should be actively given, antiviral agents for viral infection, and antifungal agents for fungal infection. If parasitic infections are present, dewormers should be given. Chronic urticaria often requires two or more anti-allergy drugs. Severe urticaria requires hospitalization and, if necessary, oxygen, intravenous hormone infusion, and blood pressure boosting drugs; oral Chinese medicine can be selected to expel wind and strengthen the spleen, cool the blood and detoxify the toxins. Topical medication can be used to stop the itching with Furfuryl Glycolate lotion.