TL;DR: Epistaxis is a nosebleed in dogs that can range from minor spotting to heavy flow; it requires prompt veterinary evaluation, especially if bleeding lasts over five minutes or is accompanied by pale gums or breathing difficulties.
What exactly is epistaxis in dogs and how does it appear?
Epistaxis is the clinical term for a bloody nose. In dogs, this discharge can range from a few drops of bright red blood to a persistent, heavy flow. It may also appear as pinkish mucus or dark, clotted discharge. Because dogs use their noses for everything, any sign of blood should be monitored closely as it indicates an underlying issue within the nasal passages or a systemic health problem.
When should I seek emergency veterinary care for my dog's nosebleed?
Urgency Level: High. A bloody nose in a dog is often a sign of a serious condition and should be evaluated by a veterinarian as soon as possible. Seek immediate emergency care if:
- The bleeding does not stop within five to ten minutes.
- Your dog is struggling to breathe.
- You notice other symptoms like pale gums, lethargy, or bruising on other parts of the body.
- Sudden, heavy bleeding occurs, which can quickly lead to anemia or shock.
Why is it helpful to take a photo of my dog's nosebleed for the vet?
Taking a clear photo or short video of the discharge can be incredibly helpful for your veterinary team. A visual record provides the following vital information:
- The total volume of blood lost.
- The color of the discharge, which distinguishes between fresh bleeding and older issues.
- Whether the blood is coming from one nostril or both.
- Clues to help narrow down causes such as foreign objects, dental disease, or clotting disorders before you arrive at the clinic.
Clinical Context (Merck Veterinary Manual)
Epistaxis in dogs may be caused by oronasal neoplasia, dental disease (oronasal fistula), nasal foreign body, or nasopharyngeal disease (foreign body or mass lesions). Intranasal fungal infection or neoplasia can also cause epistaxis. Diagnostic evaluation should include a CBC, serum chemistry profile, and urinalysis to exclude concurrent systemic disease. If epistaxis is present, a one-stage prothrombin time, partial thromboplastin time, and buccal mucosal bleeding time should be considered in addition to a platelet count. Imaging of the nasal chambers via nasal/dental radiographs or CT is recommended. Rhinoscopy and nasal flushing are useful diagnostic tools, but should be delayed until after imaging to avoid iatrogenic changes. Nasal tumor types include adenocarcinoma, anaplastic chondrosarcoma, epidermoid carcinoma, esthesioneuroblastoma, neurofibrosarcoma, neuroendocrine carcinoma, and squamous cell carcinoma.
Chapter: Otorhinolaryngology, Diagnostic Imaging, Clinical Pathology
Source: The Merck Veterinary Manual, 11th Edition (Page 1480)