In recent years, as people’s living standards improve, more and more families are keeping pets, with dogs and cats accounting for the majority. Accordingly, allergies caused by pets are also a growing concern. Pet allergies can cause allergic rhinitis, asthma, allergic conjunctivitis, urticaria, and atopic dermatitis. Pet allergens mainly come from pet hair, dander, saliva, urine and blood stains, etc. Because most particles are smaller than 5 microns and are dispersed in the air for a long time, they are often inhaled by humans into the lower respiratory tract and are especially likely to cause asthma. In addition to dogs and cats, we have also encountered patients who are allergic to other pets such as chinchillas, parrots and Dutch pigs in our outpatient clinics. For pet allergy patients, we recommend that it is best to stop keeping pets, and even then, it takes about 20 weeks for the concentration of pet allergens indoors to drop to a level comparable to that of a non-pet household. If you insist on having pets, it is best to keep them out of the bedroom, vacuum the room, remove carpets and furniture, and clean the walls. When grooming your pet, wear a cover to avoid inhaling dander, and have an air filter at home to remove dander that is floating around. In addition, frequent bathing of pets can be a good way to wash off their dander and reduce allergens. In addition, studies have shown that pregnant women who live with pets are less likely to have children born with allergies to animals. Children growing up with animals can make their immune system better suited to allergens and prevent pet allergies and asthma. However, if the parents have a history of allergies, then the child should be cautious about having pets. Once it is discovered that the child is breathing significantly abnormally with the pet, then it is better not to keep it.