Allergic rhinitis is generally not contagious to children, but it may be inherited to children for the following clinical reasons: First, allergic rhinitis is not contagious to children because the pathogenesis of allergic rhinitis is the patient’s exposure to allergens, which induce rapid-onset nasal allergic reactions in the body. Allergic reactions are mainly caused by microorganisms, airborne dust mites, plants, pollen, animal fur, and viruses and bacteria. Viruses and bacteria are very few of them. Clinically, the so-called infection is mainly the infection of viruses and bacteria, and there is cross-contamination, but this is not the case with allergic rhinitis. Secondly, allergic rhinitis can be passed on to the child because the child and the parents have similar DNA genes and other systems, resulting in the child’s body may have the same allergens as the mother or father. Once exposed to the same allergen, it may cause both parents and children to develop allergic rhinitis at the same time. The occurrence of allergic rhinitis and the patient’s exposure to allergens is only one of the pathogenic principles.