Does Your Dog Have Vaginitis?

If your dog has been scooting across the floor, licking at her vulva, or leaving discharge on her bed, it’s worth looking into. Vaginitis, which is inflammation of the vaginal area, is one of the more common and treatable conditions in female dogs. Most cases resolve well with the right care. That said, a few of its symptoms overlap with more serious conditions like pyometra, so knowing what you’re looking at matters.

Puppy vaginitis vs. adult-onset vaginitis

Not all vaginitis is the same, and your dog’s age is one of the first things your vet will consider.

Juvenile vaginitis (puppy vaginitis)

This type shows up in puppies and young dogs who haven’t yet had their first heat cycle. It’s actually pretty common and, in many cases, resolves on its own once the dog goes through puberty. The hormonal changes that come with a first heat often clear things up without any treatment at all. Your vet may recommend gentle cleaning with medicated wipes or a chlorhexidine douche (a mild antiseptic rinse) to keep things comfortable in the meantime, but intervention is often minimal.

Adult-onset vaginitis

In adult dogs, including spayed dogs, vaginitis almost always has an underlying cause that needs to be identified and treated. Vaginitis in spayed dogs tends to get less attention, but it does happen, and it’s worth taking seriously. A spayed dog with vaginal discharge or recurring irritation isn’t going through a heat cycle, so something else is going on.

What are the signs of vaginitis in dogs?

Here’s what you might actually notice at home:

• Vaginal discharge (can be clear, cloudy, yellow, or greenish)
• Frequent licking at the vulva
• Scooting across the floor
• A swollen or red vulva
• Increased urination or straining to urinate
• Attracting male dogs even when not in heat

Some dogs are visibly uncomfortable, while others show only subtle signs. If you’re seeing any combination of the above, especially discharge paired with licking and scooting, a vet visit is the right call.

What causes vaginitis in dogs

In adult dogs, vaginitis usually has a root cause. In some cases, no specific cause is ever found. When that happens, vets call it idiopathic vaginitis. Common causes include:

• Bacterial infection: The most frequent culprit. An overgrowth of bacteria in the vaginal area triggers inflammation and is often what’s behind recurring cases.
• Urinary tract infection (UTI): Bladder infections and vaginitis often occur together and can make each other worse. Treating one without the other is a common reason symptoms keep coming back.
• Anatomical abnormalities: Skin folds around the vulva, especially in overweight dogs, can trap moisture and bacteria. In some cases, a surgical correction called a vulvoplasty or episioplasty, where a vet reshapes the tissue around the vulva to improve airflow and hygiene, is the most effective long-term fix.
• Ectopic ureter: A condition where one or both ureters (the tubes that carry urine from the kidneys to the bladder) connect in the wrong place, causing urine to leak into the vaginal area. This can lead to both vaginitis and urinary incontinence.
• Foreign bodies: Grass awns or debris lodged in the vaginal canal can cause persistent irritation and inflammation.
• Hormonal imbalances: Changes in hormone levels can affect the vaginal environment and make it more susceptible to inflammation.
• Viral infections: Including canine herpesvirus, which can cause inflammation of the vaginal tissue.

How do vets diagnose vaginitis in dogs?

Your vet will start by doing a physical exam and asking about your dog’s symptoms, whether she’s spayed, and what her heat cycle history looks like. From there, they’ll piece together what’s going on.

One of the first things they’ll likely do is take a gentle swab of the vaginal area, called a vaginal cytology. The cells collected get looked at under a microscope to check for signs of infection, inflammation, or hormonal changes. It sounds more involved than it is, and most dogs tolerate it just fine.

They’ll also want to check a urine sample, because UTIs and vaginitis tend to show up together and can look nearly identical from the outside. Missing one while treating the other is one of the most common reasons symptoms keep coming back.

If your vet suspects something structural, like a skin fold trapping bacteria, or something more serious like pyometra, they’ll recommend imaging, either an X-ray or an ultrasound, to get a better look at what’s happening internally. In some cases, they may also use a small scope to look directly inside the vaginal canal, which sounds uncomfortable but is usually quick and gives your vet a much clearer picture than an exam alone.

Vaginitis vs. heat cycle vs. pyometra: how to tell the difference

These three conditions can look surprisingly similar from the outside, but they have very different causes and very different levels of urgency. Here’s how to read what you’re seeing:

	Heat cycle	Vaginitis	Pyometra
Discharge	Bloody or straw-colored	Yellow, greenish, or cloudy	Thick, often foul-smelling (or none at all in closed pyometra)
Vulva	Visibly swollen	Mildly swollen or red	May be swollen
Behavior	Actively seeks male dogs, flags tail	Licking and scooting, no interest in mating	Lethargic, withdrawn, not eating
Other signs	Male dogs are attracted to her	May strain to urinate	Excessive thirst and urination, vomiting
Affects spayed dogs?	No	Yes	Rarely
When it occurs	Every 6 months, predictably	Any time	Usually weeks after a heat cycle
Urgency	Normal, not an emergency	Warrants a vet visit	Medical emergency

A note on pyometra

Pyometra deserves its own callout because it’s the one condition on this list that can become fatal quickly. It comes in two forms: open pyometra, where discharge is visible, and closed pyometra, where the cervix is shut and nothing drains out, making it harder to spot and more dangerous. A dog with pyometra will usually seem genuinely unwell, not just uncomfortable. If your intact dog has recently been in heat and is lethargic, off her food, drinking excessively, or vomiting, don’t wait. Call your vet immediately.

How is vaginitis in dogs treated?

Treatment depends entirely on what’s causing the inflammation. Your vet may recommend:

• Antibiotics: If a bacterial infection is confirmed, a course of oral antibiotics is usually the first step.
• Topical cleaning: Gentle cleaning with medicated wipes or a chlorhexidine douche to reduce bacteria and soothe irritation.
• Addressing the UTI: If a urinary tract infection is present alongside vaginitis, it needs to be treated at the same time to prevent recurrence.
• Surgical correction (vulvoplasty or episioplasty): For dogs with anatomical issues, like a recessed or hooded vulva, surgery to reshape the tissue can resolve chronic vaginitis that doesn’t respond to other treatments.
• Waiting it out: For juvenile vaginitis, especially in otherwise healthy puppies, the vet may recommend monitoring and keeping the area clean until the first heat cycle resolves things naturally.

Does pet insurance cover vaginitis in dogs?

Yes, vaginitis is eligible for coverage under a Lemonade Pet accident and illness policy, as long as the condition isn’t pre-existing. That means your dog shouldn’t be showing any signs or symptoms before your policy starts or during your waiting period.

Diagnosing and treating vaginitis can involve vet exams, lab work, imaging, and sometimes surgery, so costs can add up quickly. Getting coverage in place while your dog is healthy is what makes it actually useful when you need it. 

Before we go

Vaginitis is common, and most cases respond well to treatment, especially in puppies where it often resolves on its own after the first heat cycle. Discharge, scooting, and licking, are your dog’s way of telling you something is off. Don’t ignore those signs. Getting a vet involved early means faster answers and fewer complications. If your dog hasn’t been seen yet, that’s the right next step.

And if you haven’t looked into pet insurance yet, now is a good time to do it while your dog is still healthy.

Frequently Asked Questions

A few quick words, because we <3 our lawyers: This post is general in nature, and any statement in it doesn’t alter the terms, conditions, exclusions, or limitations of the policies issued, which differ according to your state of residence. You’re encouraged to discuss your specific circumstances with your own professional advisors. The purpose of this post is merely to provide you with info and insights you can use to make such discussions more productive! Naturally, all comments by, or references to, third parties represent their own views, and Lemonade assumes no responsibility for them. Coverage may not be available in all states. Please note that statements about coverages, policy management, claims processes, Giveback, and customer support apply to policies underwritten by Lemonade Insurance Company or Metromile Insurance Company, a Lemonade company, sold by Lemonade Insurance Agency, LLC.  The statements do not apply to policies underwritten by other carriers.