The occurrence of allergic diseases is the result of a combination of genetic and environmental factors. However, investigations have shown that even among people with similar genetic factors but different living environments, such as between twins, their incidence rates are inconsistent. Therefore, environmental factors may play a more important role in the development of allergic diseases. At the same time, although humans have cultivated adaptations to the environment during the long evolutionary process to achieve harmony and balance between the internal and external environments. But the establishment of such adaptations necessarily takes a long time, and the changes in the environment are necessarily very slow and gradual. Therefore, it is important to fully understand our environment, especially some of the main substances that cause diseases, and thus prevent them as much as possible. This is especially important for patients with allergic diseases. For allergic substances that cannot be completely eliminated on a daily basis, allergen removal methods and blocking strategies have been gradually developed in parallel with the development of science and technology. Such as anti-dust mite bedding, allergen removers and allergen blockers, etc. The following are some brief introductions. (A) Allergen removal The avoidance measures taken for common allergens for education are often not very effective from the information of follow-up patients. Daily antiseptic disinfectants also do not work well against allergens. In recent years, with the development of biochemical technology, professional allergen scavengers have been produced and gradually applied, and we are looking forward to the research reports after its application. The following is a brief introduction of a domestic allergen scavenger. It is a combination of traditional Chinese medicine extraction and biochemical technology, developed to effectively remove indoor allergenic factors, so that they lose the role of inducing allergic diseases, and inhibit their spawning environment, so as to achieve the purpose of reducing the occurrence of disease. According to the survey, the 24-hour mite repellent and mold prevention rate can reach 95.4%. It is an indoor spray, a mixed suspension, shake well before use, evenly sprayed in the workplace, bedroom, mattress, sofa, carpet, bathroom, basement, warehouse, etc., 4-5 hours of ventilation after spraying, used 1 to 2 times a month, no toxic side effects on humans and animals. (B) Allergen blocking In the past 30 years or so, with industrialization, urbanization, westernized lifestyles and other external environmental factors, the incidence of respiratory allergic diseases and bronchial asthma has been increasing. There is much evidence that exposure to respirable particulate matter such as ozone, nitrogen dioxide, and sulfur dioxide aggravates airway obstruction in asthma patients.PM can cause airway inflammation and increase airway hyperresponsiveness, leading to allergic diseases. Therefore, the impact of air pollution particulate matter on human health should be of wide concern to the majority of patients. With 400 million patients suffering from allergic rhinitis and 300 million asthma worldwide, there is an urgent need to develop effective treatment methods. Numerous studies in the past have found that among the numerous allergic inflammatory cytokines and mediators, no single cytokine or mediator can completely determine the development of allergic inflammation and airway hyperreactivity. Therefore, the studies that have been conducted suggest that allergic inflammation is the result of an uncontrolled immune cascade response of the body. Studies only downstream of this uncontrolled immune cascade do not contribute to the understanding of the full picture of metaplasia and its true prevention and control. We should consider research at the pivotal point of the initiation and regulation of this uncontrolled cascade to block the reaction and achieve better control. This suggests the need to develop therapeutic measures that can block the entry of allergens into the body. Current research has found that allergen blockers are the right treatment for this requirement. They are known as “invisible masks”. Its main component is a highly refined long-chain hydrocarbon that forms a protective film in the nasal vestibule to prevent allergic reactions caused by allergens such as pollen, dust mites or animal hair. It is also being investigated to see if it can address the underlying problems that trigger allergic rhinitis and allergic asthma at the source and achieve a more desirable therapeutic effect.