It started with some scratching. Probably just dry skin. Then came the paw licking. I mean…dogs are weird and gross sometimes, right? Then came the smell. You didn’t buy Fritos, so why does the whole house smell like someone just opened a fresh bag of corn chips?
Strangely enough, that combination of itching, licking, and a musty, corn chip-like smell often points to a yeast infection.
Most yeast infections in dogs are caused by an overgrowth of Malassezia, a type of yeast that’s already living on your dog’s skin. Under normal conditions, it quietly coexists with bacteria and other microorganisms that make up the skin’s microbiome, but when that balance is disrupted, the yeast can multiply rapidly, leading to inflammation, irritation, and that unmistakable odor
What is a Yeast Infection in Dogs?
Yeast and bacteria naturally live on your dog’s skin, and that’s actually a good thing. Together, they make up the skin microbiome, a community of microorganisms that helps protect the skin and keep it healthy. Problems start when something throws that balance off. The yeast begins multiplying faster than the body can keep it under control, leading to irritation and infection.
Common Symptoms of a Dog Yeast Infection
Itching
Paw licking
Red skin
Musty or “corn chip” odor
Head shaking
Dark ear discharge
What is Malassezia Dermatitis?
There are thousands of species of yeast in the world, but only a handful commonly affect animals. In dogs, the most common culprit is Malassezia pachydermatis, a species of yeast that naturally lives on healthy skin and in the ears.
While Malassezia dermatitis may sound intimidating, you can actually break down veterinary terminology into simple parts.
Malassezia is the yeast causing the infection, dermat- means skin, and -itis means inflammation, so the term literally means inflammation of the skin caused by Malassezia yeast.
Are Yeast Infections in Dogs Contagious?
No. Dogs don’t catch yeast infections from each other the way they might catch kennel cough or intestinal parasites. If one dog in your household has a yeast infection, you don’t need to worry about your other dog catching it through normal contact. Healthy dogs naturally have yeast living on their skin.
Where Yeast Infections Occur in Dogs
Yeast inhabits every part of a dog’s skin, so it’s possible to get a yeast infection anywhere on their body. However, yeast prefers areas that are warm, dark, and moist.
Dog Skin Fold Yeast Infections
The skin folds on a Bulldog’s face or the extra skin on a Shar Pei create the perfect little microclimate for Malassezia.
Skin fold yeast infections can also occur around the vulva of female dogs, in armpits and groins, or in skin folds across the body when a dog is overweight.
Look for: itching, redness, and flakiness in those folds along with a musty odor.
Dog Ear Yeast Infections
A dog’s ear canal is shaped like the letter “L,” which limits airflow and makes it harder for moisture to escape. Water from swimming or bathing, trapped debris, and inflammation from allergies can all create the warm, humid environment yeast loves. That’s why dogs with floppy ears, frequent swimmers, and dogs with underlying allergies are especially prone to recurring dog ear infections.
Look for: head shaking, ear scratching, and a musty smell.
Dog Paw Yeast Infections
A dog’s paw puts up with a lot of wear and tear. Every time a dog licks its paws, it adds moisture. That creates a cycle where irritated skin leads to licking, licking traps even more moisture, and yeast has an easier time multiplying. If this moisture isn’t taken care of, it can lead to Malassezia overgrowth between the toes and pads.
Look for: redness, heat, and obsessive licking.
Causes of Canine Yeast Infections
Most yeast infections in dogs are caused by allergies, trapped moisture, or an underlying medical condition that allows naturally occurring yeast to multiply out of control. Your veterinarian wants to identify what allowed the yeast to overgrow in the first place, because treating that underlying cause can help prevent future infections.
Allergies
Allergies in dogs are one of the most common reasons they develop recurring yeast infections. When an allergic reaction inflames the skin, it weakens the skin’s protective barrier and creates an environment where yeast can thrive. Common triggers include pollen, dust mites, mold, certain foods, flea bites, and environmental irritants.
As long as the allergy remains unmanaged, yeast infections are more likely to return. That’s why your veterinarian may recommend allergy testing, an elimination diet, or long-term allergy management in addition to treating the yeast infection.
Moisture and Skin Folds
Moisture helps yeast multiply, so if moisture is left on the skin, it can lead to a yeast infection. Dogs that swim, have been out in the rain, or just had a bath are at risk of developing a yeast infection if they aren’t thoroughly dried.
Immune System or Hormonal Conditions
When yeast infections keep coming back despite treatment, your veterinarian may start looking for an underlying medical condition. Certain diseases can change the skin’s environment or make it more difficult for the body to regulate normal yeast populations. These include:
Hypothyroidism, which can slow skin cell turnover and affect the skin’s protective barrier
Cushing’s disease, which weakens the immune system and makes infections more likely
Diabetes, which can make dogs more susceptible to infections as a whole
Immune disorders or medications that suppress the immune system, such as long-term steroid use
Recurring yeast infections don’t automatically mean your dog has one of these conditions. But if infections become frequent or difficult to control, your veterinarian may recommend bloodwork or other tests to look for an underlying cause.
Dog Yeast Infection Treatment
Yeast infections are unlikely to go away on their own and require veterinary care.
Yeast Infection Diagnosis
Your vet will diagnose a yeast infection by visualizing the yeast under a microscope. Samples can be taken in a variety of ways, including:
Skin scraping where a dull blade is used to collect a sample of cells
Impression smear where a microscope slide or tape is used to pull a sample from the skin surface
Cotton swab is used to collect a sample of discharge from the ear
Skin biopsy takes a small piece of skin to check for yeast and other issues
Cotton swab is used to collect a sample of discharge from the ear
Skin biopsy takes a small piece of skin to check for yeast and other issues
Yeast Infection Treatment
Most yeast infections respond well to antifungal medications, but the best treatment depends on where the infection is located, how severe it is, and whether there’s an underlying condition contributing to the problem.
Your veterinarian may recommend one or more of the following treatment options:
Treatment | Typically Recommended For |
Medicated shampoo | Mild to moderate skin infections, widespread yeast affecting multiple areas, or dogs with recurring skin infections |
Antifungal cream, spray, mousse, or wipes | Small, localized infections, especially on the paws, skin folds, or other easily reached areas |
Prescription ear medication | Yeast infections confined to the ear canal |
Oral antifungal medication | Severe, widespread, or stubborn infections that need treatment from the inside out |
Allergy management | Dogs whose yeast infections are triggered by environmental or food allergies |
Treatment for an underlying medical condition | Dogs with recurring infections caused by conditions such as hypothyroidism, Cushing’s disease, diabetes, or immune disorders |
Many dogs recover with antifungal treatment alone, while others need additional treatment for allergies or another underlying condition to help prevent future infections.
Preventing Future Dog Yeast Infections
Once a yeast infection clears up, the goal shifts to preventing the next one. While not every infection can be avoided, a few simple habits can reduce your dog’s risk:
Dry your dog thoroughly after baths, swimming, or playing in the rain, paying special attention to the ears, paws, and skin folds.
Work with your veterinarian to identify and manage food or environmental allergies.
Keep skin folds clean and dry if your dog has loose or wrinkled skin.
Stay up to date on routine veterinary visits so underlying health conditions can be identified and treated early.
Does Pet Insurance Cover Yeast Infections?
A straightforward yeast infection can cost anywhere from $150 to $500 to diagnose and treat, depending on where you live and the medications your dog needs. More complicated or recurring cases can cost significantly more if additional testing or long-term treatment is needed.
Planning ahead can make unexpected veterinary bills easier to manage. If your dog is covered before becoming sick, a dog insurance policy from Embrace may help reimburse eligible costs related to yeast infections and many other covered conditions.
Consider looking into a Pet Wellness plan which can also help you budget for routine expenses, including grooming, making it easier to stay on top of the regular care that helps keep your dog’s skin healthy.
Managing Yeast Infections in Dogs
Hopefully, the next time your dog starts scratching more than usual, obsessively licking their paws, or filling the room with that unmistakable corn chip smell, you’ll know those clues often point to the same problem. Catching a yeast infection early usually means less discomfort for your dog and a quicker path to relief.