Purulent Pustules (Pyoderma) in Dogs

Author: Dr. med. vet. Gisa Löwe | Last modified: 17.02.2026
Table of contents

When to visit the vet?

Non-urgent see a veterinarian within 2–3 days

?

ORANGE for fever/apathy, large-scale infestation, severe pain, rapid spread, deep nodules/abscesses, or involvement of mucous membranes. RED for severe general disturbance or suspicion of necrotizing infection.

Unsure about what’s wrong with your pet? Feel free to use our Symptom Checker for more clarity

Definition

Pyoderma in dogs is a skin condition characterized by the formation of purulent pustules. This condition usually arises from a bacterial infection and manifests in various degrees of skin irritation and inflammation.

Can Occur with the Following Diseases:

Basics and possible causes

A dog’s skin is a complex organ that serves as a barrier against external influences such as bacteria, viruses, and fungi. Under normal circumstances, the skin is able to keep these microorganisms in check. However, if the skin’s balance is disturbed, bacteria can penetrate and cause infections.

Pyoderma is frequently caused by Staphylococcus bacteria, which occur naturally on the skin of dogs. When the skin barrier is damaged, whether through scratches, allergies, or parasite infestation, these bacteria can penetrate into deeper skin layers and cause an infection.

There are various factors that can increase the likelihood of pyoderma. These include a weakened immune system, hormonal imbalances, allergic reactions, and mechanical irritation from excessive scratching or biting.

Another possible cause is the predisposition of certain dog breeds to skin problems. Breeds with wrinkles or dense coats, such as Bulldogs or Retrievers, are more susceptible to skin infections due to their anatomical features.

Furthermore, environmental influences such as humidity, heat, and poor hygiene can also increase the risk of pyoderma, as they promote the growth and spread of bacteria on the skin.

Typical accompanying symptoms

  • Pustules: Small, pus-filled blisters on the skin that often appear red and inflamed.
  • Redness: The affected skin areas often show a distinct redness, which indicates an inflammatory reaction of the body.
  • Itching: Dogs with pyoderma often scratch or bite intensely at the affected areas, which can further damage the skin.
  • Hair loss: Scratching and infection can lead to localized hair loss.
  • Swelling: The skin may be swollen, indicating the accumulation of fluid and inflammatory cells.
  • Odor: A bacterial infection can cause an unpleasant smell, often described as putrid.

When to visit the vet?

It is important to see a veterinarian if signs of pyoderma appear. If left untreated, the infection can worsen and lead to serious complications. A visit to the vet is particularly important if the pustules are numerous or large, the skin is very red, or the dog shows intense itching.

A veterinarian should also be consulted if the dog seems lethargic, has a fever, or shows signs of pain. These symptoms may indicate that the infection has spread or that a more serious health condition exists.

If the dog has suffered from skin problems in the past, an early visit to the vet is advisable to prevent a recurrence and stabilize skin health in the long term.

Symptom recognition for animal owners and veterinary diagnostic procedures

For the pet owner, observing the dog’s skin is of crucial importance. Frequent scratching, biting, or licking at specific skin areas should be closely monitored. Changes in skin texture, such as redness or the appearance of pustules, are also important indicators of possible pyoderma.

The veterinarian will perform a thorough clinical examination to confirm the diagnosis. This includes a visual inspection of the skin and collecting a detailed medical history to identify possible causes such as allergies or pre-existing conditions.

A swab of the affected skin areas can be examined under a microscope to determine the presence and type of bacteria. In some cases, a culture is necessary to identify the specific bacterial species and test sensitivity to antibiotics.

Additionally, blood tests may be performed to assess the dog’s general health and rule out other underlying problems that could contribute to the infection.

What can pet owners do and professional therapy options

As an initial measure, the owner should try to keep the affected area clean and dry to prevent further spread of the infection. Regular gentle cleaning with an antiseptic agent can help reduce the bacterial load.

It is important to make it difficult for the dog to scratch or bite the infected areas. A protective collar can be helpful here to minimize self-injury.

The owner should ensure the dog receives a balanced diet that strengthens the immune system and promotes skin health. Omega-3 fatty acids and other supplements can strengthen the skin barrier.

Once the veterinarian has prescribed a specific treatment, the owner should follow the instructions exactly. Consistent application of medication, whether in the form of topical creams or oral antibiotics, is crucial for the successful treatment of pyoderma.

Outlook on current research

Research on pyoderma in dogs is increasingly focusing on the role of bacteria in connection with skin health. A particular focus is on Staphylococcus pseudintermedius, a common bacterium in dogs that is often associated with skin infections. Researchers are investigating how these bacteria develop resistance to antibiotics and what alternatives to conventional treatments exist.

An important aspect of current research is the study of the skin microbiota in dogs. Scientists are trying to understand the balance of beneficial and harmful microorganisms to develop new therapeutic approaches. Probiotic treatments aimed at restoring the natural balance of the skin flora are one of the most promising areas of research.

Another area of research deals with the genetic predispositions of dogs for skin problems. Certain breeds are more susceptible to pyoderma, and researchers are trying to identify the genetic factors that contribute to this susceptibility. These findings could help develop targeted breeding programs in the future that reduce the risk of skin diseases.

The development of new diagnostic methods is also an important topic in research. Scientists are working on technologies that allow for faster and more accurate identification of the specific bacterial strains causing pyoderma. These advances could lead to more personalized treatment options that are more effective and less stressful for the affected dogs.

In addition, studies are examining how environmental factors, such as diet and grooming practices, influence the skin health of dogs. Studies suggest that certain nutrients and skin care products can reduce the risk of pyoderma. These findings could lead to new long-term recommendations for the care and nutrition of dogs to prevent skin diseases.

Another interesting research approach is the development of vaccines against common pathogens of pyoderma. While research in this area is still in the early stages, there are promising results suggesting that vaccines could help prevent or reduce the occurrence of severe skin infections.

In summary, research on pyoderma in dogs is making progress on several levels. The findings from these studies promise to improve the treatment and prevention of this common skin disease in the future. By combining genetic, microbial, and environmental approaches, scientists hope to find more comprehensive and effective solutions for the problem of skin infections in dogs.

Frequently Asked Questions (FAQs)

1. What are pustules on the skin in dogs?
Pustules on the skin of dogs are small, pus-filled blisters that often indicate pyoderma or another infection. They can be caused by bacteria, allergies, or other health issues.
2. How can I tell if my dog has pyoderma?
Symptoms include redness, pustules, scaling, and itching. If you notice these signs in your dog, you should consult a veterinarian for an accurate diagnosis.
3. What causes pustules on my dog's skin?
The most common causes are bacterial infections, particularly from Staphylococcus bacteria. Allergies, parasites, and hormonal imbalances can also lead to skin problems.
4. How is pyoderma treated in dogs?
Treatment depends on the cause but often includes antibiotics and special shampoos. In some cases, changes in diet or skin care may also be necessary to resolve the problem.
5. Can pustules on my dog's skin go away on their own?
In some mild cases, the skin may recover on its own. However, it is advisable to consult a veterinarian to clarify the cause and ensure appropriate treatment, especially if symptoms persist or worsen.
6. Are certain dog breeds more susceptible to pyoderma?
Yes, certain breeds like Bulldogs, Labrador Retrievers, and German Shepherds are more susceptible to skin infections due to genetic predispositions or skin folds that can promote bacterial growth.
7. Can I treat my dog's skin problems with home remedies?
Home remedies can provide relief in some cases, but they are not a substitute for veterinary treatment. It is important to have the cause of the skin problems clarified by a professional to ensure the correct treatment.
8. How can I prevent skin problems in my dog?
Good hygiene, regular grooming, and a balanced diet can help prevent skin problems. Regular parasite control and avoiding allergens are also important prevention measures.
9. Is pyoderma in dogs contagious to humans or other animals?
Most forms of pyoderma are not contagious to humans or other animals. However, it is important to have the exact cause clarified by a vet to ensure no contagious infection is present.
10. When should I take my dog to the vet?
You should see a veterinarian if your dog shows signs of skin problems that last longer than a few days, worsen, or are accompanied by other symptoms such as fever or loss of appetite.