Petco Text Logo
Petco Pet Logo

Why is my outdoor cat sneezing green mucus? When should I see a vet?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | unneutered | 8 months and 9 days old | 9 lbs

My 1 year old cat has started to sneeze and when he does green mucas comes out of his nose. I have been washing his face with a warm wash clothe. It has been going on for a few days. He is also an outdoor cat. Maybe it is allergies? I don't have enough to go to a vet so please help! I don't know what it is.

1 Answer

Most Helpful Answer

Image profile

Answered By Jessica Keay, DVM

Veterinarian

Published on July 24th, 2018

I am sorry to hear about Mars. We can see sneezing occasionally with allergies but don't as often see green mucus with allergies. We would also worry about upper respiratory infection given his history of being an outdoor cat, and a foreign body in the nasal passages (sometimes we will find things like blades of grass that have gotten stuck up in the nasal passages. If he is eating and drinking with a normal energy level, no cough, and no breathing difficulty, you can try monitoring him and treating him with saline drops in the nose (one drop in each nostril twice daily) or steam treatments (you can put him into the bathroom while you run a steamy shower for 10 minutes a few times a day) to see if this helps. If he is not improving or develops a cough, trouble breathing, decreased appetite or energy he needs an examination by a veterinarian. You can read more about upper respiratory infection at https://veterinarypartner.vin.com/default.aspx?pid=19239&id=4951489

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored