Rhinitis and sinusitis are inflammation of the nose and sinuses in dogs.
Allergies to food, environmental allergens, or fleas can cause rhinitis and sinusitis in dogs.
Bacterial, fungal, and yeast infections can also cause rhinitis and sinusitis in dogs.
Foreign bodies, such as grass seeds or insect larvae, can also lodge in the nose and sinuses and cause inflammation.
The most common symptom of rhinitis and sinusitis in dogs is nasal discharge.
Dogs with rhinitis and sinusitis may also sneeze excessively.
Dogs may paw at their face or rub their nose on the ground in an attempt to relieve discomfort.