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Dog and Cat Nose Bleeds: Epistaxis

Posted January 09, 2014 in Dog Diseases & Conditions A-Z

Nose bleeds - often medically called “epistaxis” - are never normal in dogs or cats. When they occur, they can quickly turn into severe bleeding and be accompanied by secondary signs of shock.

There are several causes of epistaxis

  • Trauma
  • Clotting abnormalities (e.g., von Willebrand’s disease, hemophilia, or disseminated intravascular coagulation)
  • Platelet problems
  • Cancer (e.g., nasal adenocarcinoma)
  • Benign tumors (e.g., polyps)
  • Foreign bodies (e.g., sticks, plant material, etc.)
  • Infections (e.g., parasites, fungal, tick-born, or bacterial causes)
  • Dental disease (e.g., tooth root abscesses)
  • Vasculitis

It’s important to determine if the nose bleed is from one nostril (i.e., unilateral) or from both nostrils (i.e., bilateral), as that may help determine where the problem is. Unilateral nose bleeding is often due to disease on one side of the nose like cancer, tumors, or foreign bodies. Bilateral bleeding is often due to systemic (i.e., whole body) problems like a platelet or clotting abnormality.

No particular breed is recognized as being predisposed to nose bleeds, although certain medical problems that can cause epistaxis are more commonly seen in purebred dogs. Cocker spaniels and Rottweilers are more often predisposed to immune-mediated thrombocytopenia (ITP), which causes their immune system to destroy their own platelets. Dolichocephalic breeds (e.g., breeds with long noses like Irish wolfhounds, German shepherds, rough Collies, etc.) may potentially be at increased risk for nasal tumors. Certain breeds of dogs (e.g., Dobermans) are more predisposed to inherit clotting abnormalities (e.g., vonWillebrand’s deficiency) and can develop severe bleeding from surgery or even minor wounds.  

Clinical signs accompanying epistaxis

Signs may be acute or chronic; depending on the underlying disease, signs may include the following:

  • Abnormally colored discharge from the nose (may start as clear and progress to pus-colored)
  • Snorting frequently
  • Pawing at the nose or excessive rubbing
  • Halitosis
  • Not eating (inappetance)
  • Anorexia
  • Weight loss
  • Abnormal odor from the mouth or nose
  • Abnormal swelling over the nose, gums, or mouth
  • Black tarry stool (due to swallowing of the blood and its passing along the intestinal tract)

If your dog or cat has epistaxis

Certain diagnostic tests are important to rule out underlying clotting problems:

  • A complete blood count to look at the white and red blood cell count, along with the platelet count.
  • A chemistry panel to look at the kidney and liver function, along with the electrolytes and protein level.
  • A coagulation panel which often includes a platelet count, prothrombin time (PT), and activated partial

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Justine has more than 18 years of experience in the veterinary industry and is a board-certified emergency critical care veterinary specialist and toxicologist as well as the CEO and founder of Vetgirl. She is also a founding member of IDEXX’s Pet Health Network team.