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Pyoderma in Dogs

🩺 Health guideVerified: Oct 19, 2026Sources at bottom
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Sourced to the Merck Veterinary Manual

Pyoderma literally means “pus in the skin.” It can be caused by infection, inflammation, or cancer and is common in dogs.

Pyoderma in Dogs — dog health guide

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What the Merck Veterinary Manual says

Pyoderma literally means “pus in the skin.” It can be caused by infection, inflammation, or cancer and is common in dogs.

Most cases of pyoderma are caused by bacterial infections. Most of these are superficial and secondary to a variety of other conditions, such as allergies or parasites. Pyoderma that occurs in otherwise healthy animals usually resolves completely with appropriate antibiotics. Warm, moist areas on the skin, such as lip folds, facial folds, armpits, feet, and neck folds, often have higher bacterial counts than other areas and are at an increased risk for infection. Pressure points, such as elbows, are prone to infections due to repeated pressure. Any skin disease that changes the normally dry, desert-like environment to a more humid environment can cause overcolonization of the skin with bacteria.

Diagnosis is based on signs. Diagnosis of pyoderma must also include steps to identify any underlying causes. These include fleas, allergies, hypothyroidism, Cushing disease, and poor grooming. Multiple deep skin scrapings are needed to exclude parasitic infections. Bacterial and fungal cultures may also be taken.

More from the Merck guidance

The most common causes of recurrent bacterial pyoderma include failure to treat underlying causes, use of glucocorticoid drugs, and inappropriate treatment with prescribed antibiotic medications. You may contribute to a recurrence of pyoderma in your dog if you don’t carefully follow your veterinarian’s treatment directions. Even though your dog may seem better after only a few days or a week, it is still very important for you to continue the prescribed treatment program for the full length of time. The bacteria causing pyoderma can still be present and ready to multiply again if the complete course of medication is not given.

Antibiotic treatment should last for at least 3 weeks and preferably for 4 weeks. All signs (except for hair regrowth and resolution of increased pigmentation) should be gone for at least 7 days before antibiotics are discontinued. Longterm, recurrent, or deep pyodermas typically require 8 to 12 weeks or longer to heal completely. Topical antibiotics may also be used in some cases.

Attention to grooming is crucial. The hair coat should be clipped in dogs with deep pyoderma and a professional grooming is recommended in medium to longhaired dogs with superficial pyoderma. This will remove excessive hair that can trap debris and bacteria and will help grooming.

More from the Merck guidance

Dogs with superficial pyoderma should be bathed with a shampoo recommended by its veterinarian. Baths should be given 2 to 3 times per week during the first 2 weeks of treatment and then 1 to 2 times per week until the infection clears. Dogs with deep pyoderma may require daily baths with medicated shampoos diluted to one-half or one-quarter strength. Shampooing will remove bacteria, crusts, and scales, and reduce itching, odor, and oiliness. Improvement may not be evident for at least 14 to 21 days, and recovery may not be as rapid as expected. Your veterinarian can recommend the appropriate bathing program for your pet’s condition. Medicated shampoos usually need to remain on the coat for 10 minutes in order to be effective.

Frequently asked questions

Pyoderma dog?

The Merck Veterinary Manual covers this in the article linked on this page. Pyoderma literally means “pus in the skin.” It can be caused by infection, inflammation, or cancer and is common in dogs. Most cases of pyoderma are… If your dog is unwell, contact your veterinarian — this page is educational, not a diagnosis.

Pyoderma dog treatment?

The Merck Veterinary Manual covers this in the article linked on this page. Pyoderma literally means “pus in the skin.” It can be caused by infection, inflammation, or cancer and is common in dogs. Most cases of pyoderma are… If your dog is unwell, contact your veterinarian — this page is educational, not a diagnosis.

Pyoderma dog belly?

The Merck Veterinary Manual covers this in the article linked on this page. Pyoderma literally means “pus in the skin.” It can be caused by infection, inflammation, or cancer and is common in dogs. Most cases of pyoderma are… If your dog is unwell, contact your veterinarian — this page is educational, not a diagnosis.

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