Three main types of allergies plague our feline friends - food allergies, skin allergies (from flea bites, for example), and environmental allergies.
Environmental allergies can refer to anything in a cat's environment, such as dust, pollen, or humans. Dogs can be allergic to humans as well.
According to Raelynn Farnsworth of Washington State University's College of Veterinary Medicine, "It's rare, but dogs can be allergic to cat dander and people dander and vice versa. For everything."
In cats, the allergy shows up as miliary dermatitis, which results in tiny scabs, usually around their head and neck. It can also result in missing spots of hair.
Cats can also develop asthma if exposed to allergens for too long. So if your cat is sneezing or coughing, it's essential to see a vet. And you probably shouldn't worry too much since they're likely allergic to something else in their environment besides you.
People don't have as much dander as animals since we frequently bathe. Our pets are more likely to be allergic to something like perfume or beauty/skincare products we use, especially if they contain preservatives (as most do).
– WTF Fun Facts
Source: Can Your Pet Be Allergic to Humans? -- Understanding Animal Research
