Allergy time varies from person to person. If the owner is seriously allergic to cats, allergic symptoms, such as sneezing, shortness of breath, itchy skin and rash, usually appear within a few minutes after contact with cats. Generally speaking, people who are allergic to cats are not recommended to keep cats. If they want to keep a cat, the owner can buy a hairless cat and wear a mask and gloves to clean the hair when taking care of the cat or pet cat.