TL;DR: Nasal congestion in cats can lead to a dangerous loss of appetite and typically requires a vet visit within 48 hours. If your cat is open-mouth breathing or has a blue-tinged tongue, seek emergency veterinary care immediately.
What causes nasal congestion in cats and how does it affect their appetite?
Nasal congestion in cats often presents as sneezing, noisy breathing, or discharge from the nose and eyes. Unlike humans, cats rely heavily on their sense of smell to stimulate their appetite. When their nasal passages are blocked, they often lose interest in food entirely. This combination is most commonly seen with feline Upper Respiratory Infections (URIs), but can also be caused by polyps, dental disease, or environmental allergies.
When is nasal congestion in cats considered a medical emergency?
- Medium Urgency: Aim to see a veterinarian within 24 to 48 hours if your cat has congestion and has stopped eating, as they are at risk for dehydration and hepatic lipidosis (fatty liver disease).
- Emergency: Seek immediate care if your cat is open-mouth breathing, has a blue-tinged tongue, or is showing extreme lethargy.
How can photos and videos assist in triaging my cat's respiratory issues?
- High-resolution photos of your cat's face and videos of their breathing are essential for remote triage.
- These visuals allow professionals to evaluate the color and thickness of nasal discharge and identify facial swelling.
- Observing the specific effort your cat uses to breathe helps determine if they need immediate oxygen support or a scheduled appointment.
Clinical Context (Merck Veterinary Manual)
In cats presenting with nasal congestion and loss of appetite, severe cases of rhinosinusitis may require parenteral fluids to prevent dehydration and nutritional support via a nasogastric tube to maintain weight. Chronic secondary bacterial rhinosinusitis may be treated with antimicrobial chemotherapy for 3–6 weeks. Intermittent use of vasoconstrictive nasal decongestants usually provides only temporary relief of congestion. Mycotic rhinosinusitis requires antifungal therapy based on identification of a fungal etiologic agent; fluconazole (50–100 mg/day, PO) or itraconazole (50–100 mg/day, PO) may be effective for nasal cryptococcosis. Diagnosis is based on history, physical examination, radiographic findings (especially CT), rhinoscopy, nasal biopsy, and deep nasal tissue culture.
Chapter: Infectious Disease, Respiratory
Source: The Merck Veterinary Manual, 11th Edition (Page 1489)