With the increasing development of technology and industrialization, the incidence of allergic diseases is also increasing year by year, so the 21st century is called the “century of allergic diseases”. Eczema is a very common allergic inflammatory skin disease, known as “tinea cruris” in Chinese medicine, which is prone to recurrence and chronicity, often with intense itching and a polymorphic rash pattern. It is particularly common in infants and children under 3 years of age. The cause of eczema is complex and is caused by the interaction of internal and external factors, Qian Qiufang, Department of Dermatology, Shanghai Children’s Hospital. The main internal factors are your own allergic constitution, internal lesions, intestinal parasitic disease, certain metabolic diseases, endocrine and digestive dysfunction. External factors include living environment, climatic conditions, chemicals, cosmetics, fragrances, alkaline soaps, artificial fibers, animal fur, certain animal toxins, fish, shrimp, crab, milk, eggs, chocolate and other foreign proteins, certain plant stems and leaves and pollen, dust, dust mites, etc. Urticaria, commonly known as “rubella”, is characterized by temporary erythema or edema of the skin or mucous membranes. In children, it is commonly caused by food, medications, insect bites, environmental factors, but also by infections (bacteria, viruses, etc.) and has a genetic predisposition. The rash has a variety of shapes, round, oval or irregular, and can fuse into large patches. The rash comes and goes quickly and does not leave any traces after fading. Urticaria attacks may be accompanied by systemic symptoms, such as abdominal pain, chest tightness, shortness of breath and fever, indicating that the mucous membranes of the gastrointestinal tract and respiratory tract are also involved. If these symptoms are accompanied by urticaria, the child should be seen by a doctor at any time, and in severe cases, hospitalization is required. Other: Allergic rhinitis and allergic conjunctivitis can also be combined in children with allergies. Our dermatology department has accumulated rich clinical experience in the diagnosis and treatment of eczema, urticaria and other allergic diseases, and has its own unique treatment advantages: 1. Shanghai Children’s Hospital has dozens of homemade preparations, which are effective, inexpensive and good. It has been used for decades and is highly praised by parents of patients. 2.The combination of Chinese and Western medicine treatment, shorten the course of treatment, prevent recurrence and reduce the side effects of drugs. 3.Adopt Swedish Farmacia allergen detection technology to detect allergens. According to the results, patients are instructed to avoid contact with allergens in a targeted manner to prevent the onset of disease. For patients with dust mite allergy, systematic desensitization treatment can be carried out. 4.Specialists provide personalized skin treatment for children and guide parents in daily skin care. For the convenience of children with eczema, urticaria and other allergies, our hospital has opened an “Allergy Clinic” on Monday and Thursday afternoons at the Department of Dermatology, Shanghai Children’s Hospital, Shanghai Jiaotong University.