강아지 만성 비염·비강 분비물 증상과 원인, 진단·치료와 관리 포인트 총정리

Chronic Rhinitis and Nasal Discharge in Dogs: Symptoms, Causes, Diagnosis, Treatment, and Management Essentials

RespiratoryDiseasesMeongsiljang Veterinary Advisory Board

Chronic rhinitis in dogs is a condition characterized by persistent inflammation in the nasal passages and prolonged, sticky nasal discharge. The causes can vary, including infections, allergies, foreign objects, and tumors.

What Is Chronic Rhinitis and Nasal Discharge in Dogs?

A dog with sticky discharge running from its nostrils

Chronic rhinitis in dogs is a condition characterized by prolonged inflammation of the nasal mucosa, typically lasting for several weeks or more, and is marked by recurrent discharge of thick, sticky secretions. It can arise from various causes, including infections, inflammatory diseases, foreign body irritation, or tumors. Because early symptoms are often mild, owners may easily overlook them. - Nasal inflammation: Frequent irritation of the mucosa leads to persistent inflammation, which can result in respiratory discomfort, sneezing, and coughing. - Characteristics of discharge: Thick mucus persists and may sometimes be accompanied by an odor. The discharge can range from serous to mucopurulent, and occasionally become purulent with blood or purely bloody. - Disease progression: If left untreated, postnasal drip can lead to chronic coughing or aspiration pneumonia, making early diagnosis and management crucial. If symptoms persist, be sure to consult your veterinarian.

What Are the Main Causes of Chronic Rhinitis?

The causes of chronic rhinitis in dogs are varied, including infections, tumors, foreign bodies, and inflammatory diseases. - Infectious causes: Pathogens multiplying within the nasal cavity cause persistent inflammation, with risk increasing particularly during environmental changes. Bacteria, viruses, and fungi (e.g., Aspergillus, Penicillium) can be responsible. - Inflammatory and immune-mediated rhinitis: Chronic inflammation may arise from an abnormal immune response to inhaled irritants, as seen in lymphoplasmacytic rhinitis, where the underlying cause is often unclear. - Foreign body entry: Objects such as seeds, hair, or plant fragments entering the nasal cavity cause irritation. This typically tends to affect only one nostril. - Tumor possibility: Nasal tumors can be the cause in older dogs, making early detection key to treatment. Symptoms may include bloody discharge, weight loss, and facial deformity. - Genetic predisposition: Dolichocephalic (long-snouted) breeds may be more susceptible to chronic nasal conditions such as fungal rhinitis. Your veterinarian will determine the exact cause by evaluating symptoms and test results together.

A veterinarian examining a puppy's nasal cavity with an endoscope

Check for Key Symptoms and Signs

A hallmark sign of chronic rhinitis in dogs is a persistent, sticky nasal discharge lasting more than three weeks. - Nasal discharge: The mucus may run, develop an odor, or change color. Discharge that appears reddish, blackish, or bloody can be a warning sign. - Behavioral changes: Your dog may frequently scratch or rub their nose, and you might hear snorting sounds. - Physical reactions: The nose may become swollen or warm to the touch. In severe cases, symptoms can include loss of appetite, lethargy, and weight loss. - Respiratory abnormalities: Breathing may become labored, and coughing may become more frequent. - Duration: If symptoms persist for more than three weeks, immediate veterinary care is necessary. Early detection improves the success rate of treatment.

When to Seek Immediate Veterinary Care

If your dog’s nasal discharge is red or black, has a strong odor, or if they are experiencing severe shortness of breath, persistent coughing, sudden weight loss, or lethargy, immediate veterinary care is necessary. These could be signs of a serious infection or tumor, so don’t ignore them.

Diagnostic Tests for an Accurate Diagnosis

Veterinarians begin the diagnostic process by evaluating your dog’s symptoms, medical history, and physical examination findings. - Nasal endoscopy: Directly visualizes the nasal cavity to check for foreign bodies or tumors. - Imaging studies: X-rays or CT scans provide detailed views of nasal anatomy and identify abnormal lesions. - Biopsy: Tissue samples from suspicious areas are collected for pathological analysis to determine if cells are malignant. - Blood tests: Assess inflammation levels and detect infections to help trace the underlying cause. - Nasal bacterial culture: Cultivates nasal discharge to identify specific infectious bacteria. Multiple tests are often performed together to ensure an accurate diagnosis.

Treatment Options and Step-by-Step Management

Treatment depends on the underlying cause, so an accurate diagnosis by a veterinarian is essential. - Infection treatment: Antibiotics are prescribed for bacterial infections. Antifungal medications are used for fungal infections, while antibiotics may serve as complementary therapy. - Allergy management: Symptoms are alleviated with antihistamines or steroids. Managing environmental triggers is crucial. - Foreign body removal: Endoscopy is used to safely remove foreign objects from the nasal cavity. Delayed removal can lead to chronic inflammation. - Tumor treatment: Options such as surgery, radiation therapy, and chemotherapy are considered. Early detection significantly improves treatment outcomes. - Ongoing care: Continued veterinary monitoring is necessary even after symptoms improve. Treatment duration varies depending on the cause, and efforts should be made to prevent recurrence.

A veterinarian explaining a treatment plan to a puppy.

Home Care Tips

Gently wipe your dog’s nostrils daily with a soft cloth. - Nasal cleaning: Wipe away discharge with a damp cloth or warm water, avoiding any irritation. - Environmental management: Maintain appropriate humidity and use an air purifier to improve air quality. - Avoid irritants: Perfumes, detergents, and cigarette smoke can irritate the nasal passages. - Nutritional support: Provide a balanced diet and ensure adequate hydration to help strengthen the immune system. - Medication adherence: Administer prescribed medications exactly as directed by your veterinarian, following the correct dosage and schedule. - Regular check-ups: Continue regular veterinary visits even after treatment is complete.

A puppy resting comfortably in a humid environment.

Breed-Specific Precautions and Preventing Recurrence

Long-nosed, dolichocephalic breeds are known to be more susceptible to chronic rhinitis, including fungal rhinitis (aspergillosis). This is because their larger nasal surface area makes them more prone to exposure to inhaled pathogens and irritants. These breeds require regular nasal and environmental care. To prevent recurrence, consistent efforts in infection prevention and managing inflammation and irritants are essential.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

Why is my dog’s nasal discharge sticky?

This happens because persistent inflammation inside the nasal passages leads to excessive mucus production, or because an infection causes thick, sticky secretions to form.

What should I do if my pet’s nasal discharge is red?

Since blood may be present, an immediate visit to the veterinary clinic is necessary. This could be a sign of bleeding or severe inflammation.

Can chronic rhinitis be treated?

Treatment is possible depending on the cause. Infections and allergies typically improve with treatment, while tumors or foreign bodies can be resolved through removal.

Can I clean my pet’s nasal passages at home?

Gently wiping with a soft cloth is fine, but avoid forcing a bath or inserting anything. Always follow your veterinarian’s instructions.

Can persistent nasal discharge spread to the lungs?

Yes, if left untreated for a long time, the infection can spread to the lungs. If symptoms such as coughing, difficulty breathing, or weight loss occur, immediate veterinary care is necessary.

Comparison of Characteristics and Management by Cause of Chronic Rhinitis

Item	Main Characteristics	Treatment Method	Precautions
Bacterial infection	Sticky discharge, causes odor	Antibiotic treatment	Treat for a sufficient period as directed by the veterinarian
Inflammatory/allergic	Nasal irritation, repeated sneezing	Anti-inflammatory treatment such as steroids	Environmental factor management essential
Foreign body	Discharge from only one nostril	Removal by endoscopy	Immediate removal required
Tumor	Reddish nasal discharge, weight loss	Surgery, radiation therapy	Early detection is important

Since treatment varies by cause, an accurate diagnosis is essential.

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References

[1] BSAVA Manual of Canine and Feline Dermatology, 4th Ed. (2013). BSAVA Publications.

[2] Moore PF (2014). A review of histiocytic diseases of dogs and cats. Veterinary Pathology 51, 16-184.

[3] Gross TL, Ihrke PJ, Walder EJ and Affolter VK (2005). Skin Diseases of The Dog and Cat. Clinical and Histopathological Diagnosis, 2nd edn. Blackwell Publishing.