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Updated on September 23rd, 2025
Pet's info: Dog | Mixed Breed Large (61lb +) | Male | neutered | 90 lbs
Dogs nose just started bleeding. Just out of one nostril. What could be the cause? He's a senior dog
4 Answers

Answered By Dr. Melanie, BVSc MS
Veterinarian
Published on March 27th, 2017
Answered By Lauren Jones VMD
Veterinarian
Oh no, Shadow! Bloody noses (epistaxis) can occur for several reasons, including nasal tumors, severe nasal infections (fungal or bacterial), coagulopathies (bleeding disorders), among others. Shadow should be examined by his vet and have a coagulation panel performed to assess his platelets and blood clotting factors. He may also need to have x-rays performed of his nasal cavity and chest to look for the presence of masses.
1Pet Parents found this answer helpful
Answered By Jenny, DVM
Veterinarian
Published on August 17th, 2017
It can be from a sinus infection whether from a fungus or bacteria. A tumor is a possibility as most growths occur further up the sinus cavity and nose and are only visible with a scope being passed with anesthesia. The only way to get more answers is to start doing testing with X-rays and a scope or culture for bacterial growth.
1Pet Parents found this answer helpful
Answered By Jennifer Summerfield, DVM CPDT-KA
Veterinarian, Certified Dog Trainer
Published on January 27th, 2017
Poor Stella! I'm sorry to hear that she's having this problem. Unfortunately, bloody nasal discharge in an older dog like this (especially if only one side is affected) is most often due to a nasal tumor of some kind. Other possible causes would include a nasal foreign body, a severe bacterial infection, or a fungal infection of the nasal cavity. Since the anti-inflammatory and antibiotics have not helped, I would strongly suggest talking with your vet about options for further work-up. In most cases like this, a rhinoscopy is needed in order to make a definite diagnosis. This usually requires referral to a specialist, since most general practice vets do not have the equipment or the expertise to do this test - your vet can tell you where your nearest referral center is, and help you make an appointment there if you with.
1Pet Parents found this answer helpful