Cats sneeze occasionally, and you usually don't need to worry about a stray sneeze or two. Respiratory infections, vaccines, allergies, and nasal blockages may cause more frequent sneezing. If your cat keeps sneezing multiple times in a row or for several days, it's best to call a vet.

The most common cause of persistent sneezing in cats is an upper respiratory tract infection, usually due to viruses such as feline herpesvirus and feline calicivirus. Both these viruses are contagious between cats but cannot be caught by humans. Stress can often worsen the signs of infection or increase transmission between cats.

A cat’s sneeze can have several different causes — The possible causes are upper respiratory infections, polyps, and dental disease. There are ways you can relieve your cat’s sneezing — As you monitor your cat’s symptoms, clean their discharge, make their food more enticing, and isolate sick pets.

If you notice your cat sneezing more than usual, it could be due to: Upper respiratory infection Exposure to toxin Reaction to dust, pollen, or another allergen Foreign body in the airway (like a blade of grass) Structural abnormality Cancer (often squamous cell carcinoma or lymphoma)

Inhaled irritants or allergens are other common causes of sneezing in cats. Viral, bacterial, or fungal infections. If you’ve got a sneezing cat, chances are good the cat has an upper respiratory infection. Similar to colds in humans, these infections are more common in young cats, especially in those coming from animal shelters.