Active search and avoidance of allergens in children with asthma is the key to prevent recurrent asthma attacks and exacerbations as well as complete control of asthma. Milk and milk products are the most common foods for children and the most common food allergens that trigger allergic diseases in infants and children. Milk contains a variety of allergenic components such as alpha-lactalbumin, beta-lactoglobulin and casein, but after high temperature boiling, its allergenicity can be significantly reduced, and because alpha-lactalbumin has high species specificity, some children with milk allergy can consider using goat milk. Lactalbumin has a high genus specificity, so some children who are allergic to milk can consider using goat’s milk and sour milk instead. Eggs are mainly eggs, of which the albumin in the egg white is the main component that induces respiratory allergy, and the egg yolk rarely induces allergy. In addition, quail eggs, duck eggs, goose eggs and ostrich eggs can also induce allergic symptoms. 3, seafood and aquatic products Many studies have confirmed that fish, shrimp, crab, squid, shellfish and mussels can induce respiratory allergy symptoms, the allergens of these foods are usually heat-resistant, and cooked foods often induce allergies. 4, peanuts, sesame, cottonseed and other oil crops mainly with these oil crops contain high protein and polysaccharide-protein related to the consumption of raw or cooked peanut kernels can trigger allergies, once made into oil products rarely induce allergy symptoms. 5, legumes and nuts Soybeans and soy products, walnuts, pistachios, cashews, almonds, hazelnuts, pine nuts and chestnuts and other nuts cause allergies are more common. 6, fruits and certain meat and meat products such as peaches, apples, grapes, persimmons, cherries, bananas, mangoes, citrus, apricots, dates, pineapples and strawberries and other fruits and beef, lamb and other foods can induce allergic symptoms, especially the seeds and skins of fruits, rotten meat is more likely to induce allergies. 7, other foods and food additives such as cereals, celery, onions, spices, coffee and food flavoring, etc. Inhalant allergens Inhalant allergens are mainly divided into indoor allergens and outdoor allergens. Indoor allergens include house dust, dust mites, fungi and cockroaches, etc. Outdoor allergens mainly include pollen and fungi, etc. 1. House dust mite is currently the most important allergen in the world. House dust mites feed on the dander shed by the human body and are mainly parasitic on bedroom beds and bedding, carpets or sofas, and have breeding advantages in humid areas. 2, house dust The organic components of house dust are the main allergens that cause allergies, mainly including human epithelial debris, animal fur and debris, dust mites and secretions, mold and metabolites, pollen, cotton fibers, plant fibers, food residues, etc. 3, mold indoor air and the environment in the atmosphere of mold and its branch spores are the main allergens that cause allergies. In coastal, tropical, humid and rainy and low altitude areas, especially in the summer, the surrounding environment and the mold in the living room is very easy to breed. 4, pollen China usually divides pollen into three main categories. Common spring allergenic pollen includes poplar, elm, willow, pine, cypress, maple poplar, composition, birch, maple, hazel, ginkgo, hovering berry, walnut, eucalyptus, mulberry; our summer pollen is dominated by grass pollen, mainly including corn, sorghum, wheat, lawn grass, sedge, quinoa and amaranth plants and other pollen; autumn pollen mainly includes ragweed, artemisia, quinoa, etc. 5, insects and animals Cockroaches have been recognized as one of the main allergens causing allergic diseases. The secretions, dander and hair loss of pets such as cats, dogs, rabbits and birds kept at home are one of the main allergens causing allergic diseases. Many children also have allergenic proteins in the urine of rodents such as mice kept indoors. Down jackets, duvets, etc. have been shown to cause allergies. 6, silk products mainly refers to silk products made of silk as raw materials such as silk cotton, silk, or silk cotton as cotton, quilt filler or sweaters, carpets, auxiliary materials. Due to the many substances in nature, allergens that can cause allergies are very complex. Currently, hospitals with conditions can detect more than 20 of the most common allergens that cause allergies. Once the allergenic substances are clearly identified, the best approach is to avoid further contact – i.e. avoidance therapy – while children over the age of 4 who are severely allergic to dust mites can be considered for desensitization therapy. When allergic symptoms appear, children with mild allergies can be treated with oral anti-allergy medications such as Keratan, while children with severe allergies can be treated aggressively with intravenous glucocorticoids.