Causes and Treatments for a Runny Nose in Dogs

A runny nose in dogs can be more than just a mild annoyance, it may be a sign of something more serious. While occasional nasal discharge isn’t always a cause for concern, consistent or unusual symptoms can point to underlying issues that deserve a closer look. If your dog’s nose has been dripping more than usual, or if the discharge has changed in color or smell, it’s time to pay attention. In this blog, we’ll walk through the most common causes of a runny nose in dogs, how veterinarians approach diagnosis, and the treatment options that may follow. Whether your dog’s symptoms appeared suddenly or have been lingering, this guide will help you understand what might be going on and what steps to take next. If your pet is showing signs of illness or discomfort, please call Bottletree Animal Hospital at (662) 234-4336.

 

 

What Does a Runny Nose in Dogs Look Like?

Before diving into the causes, it helps to understand what constitutes a runny nose in dogs. Nasal discharge can vary in consistency, color, and frequency. Clear discharge is often seen with allergies or mild irritants, while yellow, green, or bloody discharge can point to infection or more severe problems. Some dogs may also show additional symptoms, such as sneezing, coughing, facial swelling, or pawing at their face.

Not all runny noses in dogs are the same, which is why tracking the details can help your veterinarian narrow down the issue. Pay attention to whether one or both nostrils are affected, whether the discharge has a foul odor, and if your dog’s appetite or energy levels have changed. These details play an important role in identifying what’s causing the problem.

Common Causes of a Runny Nose in Dogs

A runny nose in dogs can develop for many reasons, ranging from mild and temporary to chronic or complex. Here are some of the most common culprits.

Allergies

Just like people, dogs can suffer from environmental allergies. Pollen, dust mites, mold, and household cleaning products can trigger allergic reactions that result in clear nasal discharge, sneezing, and occasional itchiness. Seasonal changes often bring on allergy symptoms in sensitive dogs, especially in the spring and fall. Some dogs also experience food allergies that present with nasal symptoms, although this is less common. If your dog has a runny nose along with itchy skin, ear infections, or gastrointestinal problems, food sensitivities might be involved.

Upper Respiratory Infections

Viruses and bacteria are frequent causes of a runny nose in dogs. Canine influenza, kennel cough (Bordetella), and canine distemper are among the illnesses that can affect the upper respiratory tract. These infections often come with additional symptoms like a cough, lethargy, fever, or loss of appetite. Many of these illnesses are highly contagious, especially in places like boarding facilities or dog parks. If your dog has been around other dogs recently and starts to show signs of illness, an upper respiratory infection could be the reason.

Foreign Objects

Dogs love to sniff everything, which sometimes leads to inhaling small particles or debris. Grass seeds, bits of dirt, or even small twigs can become lodged in the nasal passages and cause irritation. A dog with a foreign object in their nose may have a persistent runny nose on one side, often with blood-tinged discharge. You might also notice your dog sneezing violently, pawing at their face, or shaking their head. These signs usually show up suddenly and warrant prompt veterinary attention.

Dental Problems

You might not immediately connect dental issues to a runny nose in dogs, but they can be closely related. Infections in the upper teeth, especially the large premolars, can extend into the nasal passages and lead to nasal discharge. Dogs with severe dental disease may also show signs like bad breath, drooling, or chewing on one side of their mouth. If your veterinarian suspects a dental issue, they may recommend dental X-rays or an oral exam under anesthesia to identify the root of the problem.

Nasal Tumors or Polyps

A persistent or worsening runny nose in dogs, particularly one that includes bloody or pus-filled discharge, can sometimes point to growths within the nasal cavity. These may be benign polyps or, in some cases, nasal tumors. While this isn’t a common cause, it’s more likely in older dogs and those with long-term symptoms that haven’t improved with treatment. Your vet may recommend imaging studies to evaluate the nasal passages more thoroughly.

How Veterinarians Diagnose a Runny Nose in Dogs

Diagnosing the cause of a runny nose in dogs often begins with a physical exam and a review of your dog’s history. Your vet will ask about how long the symptoms have been present, any changes in behavior, and any recent exposure to other animals or environments. Depending on the findings, your veterinarian may recommend one or more of the following diagnostic steps:

Nasal Swabs or Cultures

Collecting a sample of nasal discharge can help identify bacterial or fungal infections. Lab analysis provides information about the type of organism involved and what medications may be effective.

Blood Work

Routine blood tests can check for signs of infection, inflammation, or underlying systemic illness that could be contributing to your dog’s symptoms.

Imaging

Dental radiographs, skull X-rays, or more advanced imaging may be used to visualize the nasal cavity, sinuses, and surrounding structures.

Allergy Testing

If environmental allergies are suspected, intradermal testing or blood tests may help identify triggers. This can be helpful when symptoms are recurrent or seasonal.

Treatment Approaches for a Runny Nose in Dogs

Once your veterinarian has determined the cause of your dog’s runny nose, treatment can begin. Each case is different, so recommendations will depend on the diagnosis.

Medications

For infections, antibiotics or antifungal medications may be prescribed. In cases involving inflammation or allergies, antihistamines or corticosteroids may be used to reduce symptoms. If the issue involves more chronic conditions like nasal tumors, treatment may include surgery, chemotherapy, or referral to a veterinary specialist.

Dental Care

If dental disease is the cause, professional cleaning and possibly tooth extraction may be necessary. Proper dental care at home and regular cleanings can help prevent these issues from returning.

Foreign Body Removal

If a foreign object is lodged in the nose, your veterinarian will need to remove it, often under sedation. Prompt treatment typically leads to fast relief and a quick recovery.

Supportive Care

Dogs recovering from respiratory illness may benefit from fluids, rest, and a calm environment. Follow your veterinarian’s guidance closely during recovery to support your pet’s return to health.

When to Call Your Veterinarian at Bottletree Animal Hospital

Mild, occasional nasal discharge isn’t always a problem, but persistent or unusual symptoms should never be ignored. Contact your veterinarian if:

• Discharge lasts more than a few days
• The discharge is thick, yellow, green, or bloody
• Your dog has trouble breathing or makes wheezing sounds
• Other symptoms like coughing, lethargy, or appetite changes develop
• Only one nostril is affected

Early diagnosis often leads to more effective treatment and better outcomes. If you’re in the Oxford, MS area and your dog is showing signs of illness, call Bottletree Animal Hospital at (662) 234-4336.

Get the Answers Your Dog Deserves

While a runny nose in dogs can be caused by something simple, it can also signal a deeper issue that needs veterinary care. Paying close attention to the type of nasal discharge and how your dog is feeling overall can help your veterinarian determine what’s going on. Whether it’s an allergy, an infection, or something more complex, the sooner your dog is evaluated, the better their chances for a quick recovery. If you’re concerned about a runny nose in your dog, reach out to Bottletree Animal Hospital in Oxford, MS. Call us at (662) 234-4336 to schedule your appointment today.