Pet Health

Reasons Why Your Dog Has a Runny Nose

Discover common reasons your dog has a runny nose, from allergies to infections. Learn how to identify symptoms and when to consult your vet for care.
Author: Veterinary Team
Dial A Vet
Updated
June 6, 2025
|
Published
June 6, 2025
close-up of a dog with a runny nose looking concerned, highlighting potential health issues and care tips

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Have you noticed your dog’s nose dripping more than usual? A runny nose in dogs can be worrying for any pet parent, especially when you’re unsure if it’s just a harmless quirk or a sign of something more serious. While a wet nose is normal for dogs, excessive nasal discharge may indicate an underlying issue that needs attention. Let’s break down why your dog might have a runny nose and how to best support their health.

⚠️ What to Watch For

A runny nose can vary in severity and appearance, which may give you clues about what’s going on. Here are some common signs to look out for:

  • Clear, watery discharge
  • Thick, yellow, green, or cloudy mucus
  • Blood in the nasal discharge
  • Frequent sneezing or snorting
  • Difficulty breathing or noisy breathing
  • Pawing at the nose or face
  • Swelling around the nose or muzzle

Paying attention to these symptoms can help you determine whether the runny nose is a mild issue or a sign of something more concerning.

🔍 Possible Causes

Dogs can have a runny nose for a variety of reasons, ranging from harmless irritants to more serious health conditions. Here are the most common causes:

  • Allergies: Dogs can be allergic to environmental triggers like pollen, dust mites, or mold. Food allergies can also cause nasal discharge.
  • Infections: Bacterial, viral, or fungal infections can lead to nasal inflammation and discharge. Canine distemper, for example, is a serious viral infection that may cause a runny nose.
  • Foreign objects: Grass, seeds, or small debris stuck in your dog’s nasal passage can irritate the nose and cause discharge.
  • Nasal tumors: Though rare, tumors in the nasal cavity may lead to persistent nasal discharge, often accompanied by swelling or bleeding.
  • Dental problems: Severe dental infections can sometimes extend into the nasal cavity, causing a runny nose.
  • Irritants: Strong scents, smoke, or chemicals can irritate your dog’s sensitive nasal tissues, leading to temporary discharge.
  • Congenital conditions: Some breeds, particularly brachycephalic dogs like Bulldogs and Pugs, are prone to nasal discharge due to their unique facial structure.

Identifying the cause of your dog’s runny nose is the first step toward providing effective care.

✅ What You Can Do at Home

Depending on the cause, there are several steps you can take to help your dog feel better. Here are some practical tips for managing a runny nose at home:

  • Monitor the discharge: If it’s clear and watery, the issue may resolve on its own. Keep an eye on your dog for any changes in behavior or symptoms.
  • Limit exposure to irritants: Avoid smoking indoors, strong cleaning chemicals, or heavily scented products around your dog.
  • Keep your dog hydrated: Ensure your dog has access to fresh water, as hydration can help thin mucus and improve nasal drainage.
  • Use a humidifier: Adding moisture to the air can ease nasal irritation, especially in dry climates or during winter months.
  • Gently clean the nose: Use a soft, damp cloth to wipe away any crusted discharge, keeping the area clean and comfortable.

While these steps can help with mild cases, more severe or persistent issues will require veterinary attention.

💡 When to Call a Vet

In some cases, a runny nose may indicate a more serious health problem that needs prompt veterinary care. Contact your vet if you notice any of the following:

  • Nasal discharge that is thick, yellow, green, or bloody
  • Difficulty breathing, wheezing, or open-mouth breathing
  • Swelling around the nose, eyes, or face
  • Loss of appetite, lethargy, or other signs of illness
  • Persistent or worsening nasal discharge lasting more than a few days

Your vet may recommend diagnostic tests, such as X-rays, nasal swabs, or bloodwork, to determine the cause of the discharge and create a treatment plan.

FAQs

Q: Can I give my dog over-the-counter allergy medication for a runny nose?
A: Some antihistamines, like Benadryl, can be safe for dogs, but the dosage and suitability depend on your dog’s size, breed, and health condition. Always consult your vet before giving any medication.

Q: My dog’s runny nose is only on one side. Is that normal?
A: A unilateral (one-sided) runny nose may suggest a foreign object, infection, or even a nasal tumor. It’s best to have your vet examine your dog to determine the cause.

Book a $49 online vet consultation at https://www.dialavet.com for fast, expert advice.

References

While every effort is made to ensure the accuracy of this content - including vet review where applicable - this article is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is unwell or you are concerned, please speak with a licensed veterinarian. You can book a $49 online consultation with our veterinary team  😄
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