TL;DR: A crusty nose is usually a non-emergency condition caused by allergies, dryness, or age, but requires a vet visit if accompanied by colored discharge or lethargy. Clear photos are essential for triage to determine if diagnostic testing is needed.
What causes my dog to have a crusty nose and mild congestion?
- Nasal hyperkeratosis, which causes excess keratin and a dry, cracked appearance
- Environmental allergies or low humidity levels
- Mild upper respiratory infections
- Age or specific breed predispositions
Is a crusty nose an emergency for my dog?
The urgency level for this condition is generally Low. If your dog is acting normally, you should simply monitor for changes that warrant a vet appointment, such as:
- Colored discharge (yellow or green)
- Lethargy or decreased energy levels
- Loss of appetite
How does a photo help triage my dog's nose condition?
A high-quality, clear photograph helps a professional determine the severity of the condition by:
- Revealing the specific texture of the crusting and any hidden sores.
- Identifying the type of moisture or discharge present.
- Deciding if diagnostic testing, like a skin scraping or culture, is necessary.
Clinical Context (Merck Veterinary Manual)
An acute unilateral nasal discharge, possibly accompanied by pawing at the face, suggests a foreign body. Neoplastic or mycotic disease is suggested by a chronic nasal discharge that was initially unilateral but becomes bilateral or that changes in character from mucopurulent to serosanguineous or hemorrhagic. Head shyness or facial pain is more commonly associated with fungal rhinitis in dogs. Mycotic rhinosinusitis requires antifungal therapy based on identification of a fungal etiologic agent. Oral antifungal agents have variable efficacy in treatment of dogs with nasal aspergillosis, although voriconazole (4 mg/kg, PO, bid) alone or in combination with terbinafine (15 mg/kg, PO, bid for 1 month) may be effective. Animals that do not respond to medical therapy may require surgery consisting of sinusotomy or rhinotomy, lavage, and biopsy to reestablish definitive diagnosis.
Chapter: Infectious Disease, Respiratory
Source: The Merck Veterinary Manual, 11th Edition (Page 1489)