Playing with mud, rolling in the grass, catching tadpoles, piling castles, digging caves, catching bugs and other games that modern parents think are “dirty” can keep children away from allergic rhinitis and allergic asthma, and children who are too clean are prone to illness. ”White collar” children are prone to allergies In the otolaryngology clinic, it was found that allergic rhinitis children have increased significantly, and a large proportion of urban white-collar children have allergic rhinitis. Parents are particularly concerned about hygiene, and the toys and fruits that their children touch and eat are strictly disinfected, and the rooms are spotlessly clean. They also rarely take their children to play outdoors for fear of transmitting diseases. Doctors believe that these delicate babies are exposed to an environment that is too clean, and the body instead loses resistance to the outside world. The “hygiene doctrine”: too clean is not good Allergic rhinitis and allergic asthma are the same airway allergic diseases. Improvements in sanitation have made the human living environment too clean, especially for children who have significantly reduced exposure to pathogenic microorganisms, leading to an increased incidence of asthma and allergies, with allergic rhinitis rising by 100% in developed countries in the past 30 years. Epidemiological surveys have found that children from large families, children who entered nursery school early, and children who had been infected with tuberculosis or measles have a low incidence of allergic rhinitis, asthma, and other allergic diseases. This is due to the fact that exposure to each other in the nursery or in the extended family gives children a higher chance of getting a whistle infection. Conversely, the less exposure to infectious agents or inhalant infections, the higher the incidence of allergic diseases. ”Infection” is a double-edged sword The latest view is that allergic rhinitis and asthma are related to the imbalance in the ratio of immune Th cell subpopulations. The Th1 immune system, which regulates the immune and anti-infection functions, is produced only after birth when a person is exposed to bacteria, while the body itself has a Th2 system that regulates allergic reactions. Under normal circumstances, the Th1 and Th2 systems are in a state of equilibrium, and if infection with bacteria and viruses stimulates the body’s immune system to produce a Th1 response; if such infections are reduced it will lead to a weakening of the body’s Th1 response, while the Th2 response is relatively enhanced, and the body will be prone to allergies and allergic diseases. A child’s immune system is not born, but is gradually improved after being “violated” again and again during the growth process. Parents always think that the cleaner the environment, the better, not knowing that pathogens can make people sick, but also “stimulate” the body’s own defense system healthy development. If a child is kept in an overly clean environment, the immune system is not activated at all and will be as vulnerable as a newborn. Allergic rhinitis and asthma are genetically related. When parents have allergic rhinitis and asthma and the child is not yet sick, it is important to expose the child to allergens as early as possible to strengthen the immune response. Let them play “dirty” in nature! After the child’s body is exposed to a large number of external substances, the immune system will treat these external substances as “old acquaintances” early on and will not reject them, thus avoiding the occurrence of allergies.