Vaginitis in Dogs: Causes, Symptoms, and When to Treat It

In this guide

Vaginitis, inflammation of the vaginal tissue, is a fairly common but under discussed issue in female dogs, showing up as discharge or excessive licking that owners are sometimes unsure whether to worry about.

Two main patterns

Juvenile vaginitis occurs in puppies before their first heat cycle, is generally mild, and often resolves on its own once the dog matures and has her first season, needing little more than monitoring in most cases. Adult onset vaginitis is more often linked to an underlying cause and is more likely to need active treatment.

Common causes in adult dogs

• Urinary tract infections, which can cause secondary vaginal inflammation
• Anatomical issues, such as excess skin folds around the vulva trapping moisture, more common in spayed or overweight female dogs
• Foreign material, such as grass seeds
• Tumours or growths within the reproductive tract, more relevant in older, unspayed females
• Hormonal changes around a heat cycle

Signs to watch for

• Discharge from the vulva, which can range from clear to yellowish or bloody
• Excessive licking of the area
• Redness or swelling of the vulva
• Frequent urination or signs of discomfort while urinating, which may point instead to a urinary tract infection

Diagnosis and treatment

A vet will typically examine the area, and may take a vaginal swab or urine sample to distinguish vaginitis from a urinary tract infection, since the two often overlap in symptoms. Treatment depends on the cause: antibiotics for a bacterial infection, hygiene and skin fold management for anatomical cases, or further investigation if a growth is suspected. Persistent or recurrent vaginitis in an adult dog, especially one that is unspayed, is worth investigating properly rather than repeatedly treating the symptom alone.

Common Questions

Q: Does spaying prevent vaginitis? A: It reduces some causes, but anatomical cases linked to skin folds around the vulva can still occur in spayed female dogs.

Q: Is vaginitis painful? A: Mild cases usually cause more irritation and licking than genuine pain, though any accompanying urinary symptoms should be checked promptly.

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