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Dog Nose Discharge: Common Causes and Treatments

A runny nose can be a big deal for a dog, who has 220 million smell receptors compared to your 5 million. And while nose discharge can be a sign of something as simple as your dog's excitement that you're home, it can also be a symptom of a problem as serious as cancer.

Get the quick facts about the causes of nose discharge in dogs.

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Common Causes and Treatments of Nose Discharge in Dogs

Generally, you don't have to worry about clear nose discharge in dogs unless it lingers or there are other symptoms. However, discharge that's cloudy, yellow, green, or smelly is always cause for concern. When in doubt, talk to your vet.

Here are some common causes of nose discharge in dogs:

Allergies.If there's a clear nasal discharge from your dog's nose, chances are good it's caused by allergies, by far the most common reason for abnormal nasal secretions in dogs.

Just like people, dogs can be allergic to pollens, foods, drugs, mites, spores, and chemicals. They can even be allergic to human dander (our shed skin). A dog's allergy symptoms don't stop at a runny nose; they can also include sneezing, coughing, itchiness, nosebleeds, and breathing problems.

Avoiding the allergy trigger is the best way to treat allergies, but that can be hard to do, especially if you don't know what's behind your dog's symptoms. Talk to your vet, who may suggest an allergy test and/or treatment with antihistamine drugs.

A blockage. A discharge from just one of your dog's nostrils is often a sign there's something stuck in that nostril, like a seed or blade of grass. Other signs include sneezing, pawing at the nose, and nosebleeds.

If you can easily see what's in your dog's nose, carefully remove it with tweezers. If you can't or don't feel comfortable -- the nose can bleed a lot with minor trauma --  call your vet, who may need to sedate your pet to dislodge the blockage, and then prescribe antibiotics to avoid infection. 

Infection. A nose discharge of mucus or pus could indicate your dog has a bacterial, fungal, or viral infection. Additional signs of an infection might include a bad odor, a nosebleed, and coughing or choking resulting from postnasal drip.

Treatment depends on the cause. For a bacterial infection your vet may prescribe several weeks of antibiotics. Fungal infections usually require special treatments using topical anti-fungal drugs. Surgery may be necessary if your dog has chronic infections.

Polyps and tumors. Blood, pus, or mucus can be a sign that your dog has nasal polyps (overgrown mucus-producing glands) or nasal tumors. Other signs include noisy breathing or a bulge on one side of the nose. Your pet’s appetite may decrease, as well.

Treatment for polyps usually involves surgery. Because polyps tend to reappear, additional treatment might be necessary. Treatment options for nasal tumors are variable. Benign tumors may be removed with surgery. Cancerous ones are usually managed with radiation since surgical removal is rarely successful. Sadly, the prognosis for cancerous nasal tumors is generally poor.

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