Yeast infections in dogs are common skin conditions that can make your pup miserable. If your dog has been scratching nonstop, smelling a little funky, or licking until their fur turns brown, a yeast infection could be the culprit.
Thankfully, yeast infections are treatable, and you can help your pup feel better quickly when you know what to look for. In this guide, we’ll cover what a yeast infection in dogs actually is, signs of a yeast infection, what causes yeast infections in dogs, and the most effective dog yeast infection treatment options to help your pup feel better.
What is a yeast infection in dogs?
So, what is a yeast infection in dogs, exactly? Yeast infections are inflammatory skin or ear conditions caused by an overgrowth of Malassezia pachydermatis, a type of fungus that normally lives on your dog’s skin in small numbers. A healthy immune system keeps yeast in check and in balance with skin bacteria.
When allergies or other issues disrupt that balance, the yeast can multiply, causing irritation, itching, odor, and inflammation. Infections are most common in three areas of a dog’s body.
Ears
The ear canal is warm and moist, which makes it an ideal environment for yeast overgrowth. Dogs with floppy ears are especially susceptible because their ear flaps trap moisture and reduce airflow. Ear yeast infections (also called Malassezia otitis) often cause a thick, brown discharge and a musty odor.
Paws and skin folds
Yeast infections also commonly affect dog paws, especially in dogs with allergies. Affected pets may lick and chew their paws, causing rust-colored staining between the toes and encouraging yeast to grow on the damp skin. Skin folds on the face, neck, or body are also ideal areas for yeast to thrive.
Belly and groin
The belly, groin, and armpits are additional warm, low-airflow zones where skin-on-skin contact with little fur encourages yeast growth. Affected skin in these areas may be red, greasy, darkened, thick, or rough.
Signs of a yeast infection in dogs
Dog yeast infections have a distinct look and smell. Here are the symptoms to watch for:
- Intense itching and scratching: Dogs with yeast infections may scratch, bite, or rub the affected area, or drag their skin across the carpet or furniture to relieve the itch.
- Musty or yeasty odor: Many pet parents describe the smell of yeasty skin or ears as similar to that of corn chips, stale bread, or dirty gym socks.
- Red, greasy, or irritated skin: Dogs with yeast overgrowth often develop red, inflamed skin or ears that feel oily or waxy to the touch.
- Thickened or darkened skin: Chronic or recurring yeast infections can cause the skin to become thick, rough, black, and almost leathery, a change sometimes described as “elephant skin.”
- Head shaking and ear discharge: Dogs with ear yeast infections typically shake their head frequently and scratch their ears. You may see brown, waxy discharge inside the ear canal.
- Hair loss or flaky skin: Some dogs lose hair in areas affected by yeast dermatitis. Others develop flaky, scaly patches that resemble dandruff.
If your dog shows more than one of these signs, a visit to the vet is the most reliable way to diagnose the problem. Many skin issues look similar at home, but a cytology test under the microscope can help your vet tell the difference between a yeast infection, bacterial infection, or inflammation caused by allergies.
Additional testing, such as a skin scrape, can help rule out other similar conditions, such as mites or ringworm, so your vet can recommend the right course of treatment. In some cases, your vet might also recommend blood work to rule out hormonal issues, skin testing to confirm environmental allergies, or a diet trial to check for food allergies.
What causes yeast infections in dogs?
Here are some of the most common causes and risk factors for yeast infections in dogs:
- Allergies: Allergies to food, environmental triggers like pollen and dust, or flea bites can weaken the skin barrier and create inflammation that favors yeast overgrowth.
- A weakened immune system: Dogs with compromised immune systems may struggle to keep skin bacteria and yeast under control. Hormone conditions, such as hypothyroidism, Cushing’s disease, and diabetes, can suppress the immune response.
- Trapped moisture: Dogs who swim frequently, live in humid climates, or wear a cone collar to prevent them from chewing and biting their skin are at higher risk for developing yeast infections. Yeast thrives in damp areas of skin with limited airflow.
- Antibiotic or steroid use: Antibiotics kill both harmful and helpful bacteria on your dog’s skin. Without bacteria to compete with, yeast can take over quickly. Steroids are immunosuppressive and can also weaken the skin’s natural defenses.
- Excess skin oils: Dogs who produce more skin oil (sebum) give yeast more fuel to multiply and thrive. This increased oil production can be secondary to allergies or due to a condition called seborrhea.
How to treat yeast infections in dogs
Treating yeast infections in dogs usually involves a combination of approaches tailored to the location and severity of the infection. Your veterinarian’s treatment plan may include one or more of the following.
Antifungal medications
Topical antifungal creams, ointments, or sprays containing ingredients such as miconazole, clotrimazole, or econazole are good options for mild infections or for treating smaller areas. Many dogs with yeast dermatitis require oral antifungal medications, such as ketoconazole, itraconazole, fluconazole, or terbinafine.
Medicated shampoos
Antifungal shampoos containing ingredients like chlorhexidine and miconazole can help reduce both yeast and bacteria on the skin’s surface. Your vet may recommend bathing your dog two to three times per week during the active treatment phase and using wipes or rinses between baths.
Dietary changes
While there is growing evidence that nutrition may influence skin health in dogs, a diet change alone can’t treat a yeast infection. However, feeding a well-balanced diet rich in omega-3 fatty acids may affect the inflammation that leads to skin infections. Additionally, a limited-ingredient diet can help rule out food allergies as a trigger.
Allergy treatments
Anti-itch medications and immune modulators are staple allergy treatments that can help treat and prevent yeast infections caused by skin or ear inflammation. Allergies are the root cause of yeast overgrowth in many pets, and controlling them can improve overall skin health.
Grooming and ear care
Keeping your dog’s skin and ears clean and dry can help prevent yeast from gaining a foothold. Use a vet-recommended ear cleanser and cotton balls to clean the ears every one to two weeks and after swimming or bathing, then allow the ears to dry thoroughly. Your vet may recommend a medicated ear cleanser or shampoo to control yeast populations or special wipes for skin folds.
Support your dog’s skin health starting with nutrition
Yeast infections in dogs are common and treatable, but they require a proper veterinary diagnosis and a targeted approach. Knowing the signs and addressing the underlying triggers is key to providing your dog relief and preventing recurring infections.
What your dog eats is one part of supporting their overall health and well-being. A balanced, high-quality diet designed for your dog’s life stage may help support the immune system and promote healthy skin.
FAQs about yeast infections in dogs
How can I manage my dog's ear yeast infection?
Your veterinarian must diagnose an ear yeast infection using an ear swab and a cytology test, and check that the eardrum is intact before prescribing antifungal ear cleansers and medications. The medication may be applied once in the clinic, or you may need to clean the ears every few days and apply the medication once or twice daily at home. You may need to continue medication for several weeks and follow up to ensure the infection resolves.
How can I manage a yeast infection on my dog's paws?
A yeast infection on your dog’s paws must be diagnosed by your vet using a cytology test. Once identified, your vet may prescribe a combination of topical and oral antifungal medications. The best way to manage these infections is to follow your vet’s recommendations, then ask about a preventive care regimen you can perform at home to avoid recurrences.
Does my dog have a yeast or bacterial infection?
Yeast and bacterial infections on the skin or in the ears can look very similar because they both cause red, itchy, and inflamed skin. Many dogs with yeast infections have a characteristic musty odor and greasy appearance, while dogs with bacterial infections often have flaking and bumps. However, the only way your vet can tell for sure is to perform a cytology test to examine the sample under the microscope for yeast, bacteria, or both. From there, your vet can prescribe the right treatment.
This content is for informational use only and does not replace professional nutrition and/or medical advice, diagnosis, or treatment. It is not a substitute for and should not be relied upon for specific nutrition and/or medical recommendations. Please talk with your veterinarian about any questions or concerns.
