Understanding nosebleeds in dogs — causes ranging from local trauma to serious systemic disease.
Epistaxis causes acute welfare distress — dogs are frightened by unexpected bleeding from their faces, and significant haemorrhage causes weakness from blood loss. The distress of a dog with severe active nosebleed is evident — they paw at their face, may inhale blood causing coughing and gagging, and become highly anxious. Owners witnessing severe epistaxis for the first time often panic, which amplifies the dog's distress.
The welfare significance extends beyond the immediate episode to the underlying cause. Nasal tumours — a common cause of chronic unilateral epistaxis — cause progressive welfare impairment as local invasion worsens. Each subsequent bleeding episode is more severe. Without treatment (radiation therapy), the tumour progressively invades surrounding structures causing pain, facial deformity, and neurological signs.
Systemic causes — thrombocytopenia, coagulopathy, hypertension — require specific management to prevent recurrence and treat the underlying condition. Hypertension in older dogs is particularly important to identify and treat — it causes organ damage beyond epistaxis including retinal detachment and stroke.