What is Bacterial Skin Infections (Pyoderma) in Dogs
Bacterial skin infections, also known as pyoderma, are a common cause of itchy, inflamed and uncomfortable skin in dogs. They usually occur when bacteria, often Staphylococcal skin infection bacteria that normally live on the skin, overgrow and cause infection. Pyoderma may develop secondary to allergies, parasites, hormonal disease or other underlying skin problems. It commonly affects the skin surface, hair follicles or deeper layers of the skin. With proper diagnosis and treatment, most bacterial skin infections can be managed successfully.
Written by Gillian Burkhill, Veterinary Surgeon, Animal Trust Vets CIC | Published May 2026 | Review date May 2029 | This advice is for UK pets only and is not a replacement for seeing a vet
Symptoms of Pyoderma in Dogs
Dogs with bacterial skin infections may show signs such as:
Itching or scratching
Red, inflamed skin
Pimples or pus-filled spots
Scabs or crusting
Hair loss
Licking or chewing at affected areas
Skin sores or recurrent skin infections
When to contact your vet
Contact your vet if your dog has itchy, inflamed skin, pimples, scabs, hair loss or sores, especially if the problem is spreading, recurring or causing discomfort. Veterinary attention is important if the skin looks painful, infected or is not improving, as early treatment can help prevent deeper or more severe infection.
Diagnosis
Your vet will often suspect a bacterial skin infection based on your dog’s history and skin changes, but tests are often needed to confirm the diagnosis. This may involve examining skin samples under a microscope and, in some cases, performing a bacterial culture. Because pyoderma often develops secondary to problems such as allergies, parasites or hormonal disease, your vet may also investigate for an underlying cause.
Treatment of Bacterial Skin Infections in Dogs
Treatment often involves antibacterial shampoos, topical medications or antibiotics, depending on the severity and depth of the infection. Some dogs may need longer treatment courses, especially in recurrent or deeper infections. Just as importantly, any underlying cause needs to be addressed to help prevent recurrence.
Prevention of Bacterial Skin Infections in Dogs
Preventing bacterial skin infections often involves managing underlying causes such as allergies or parasites, maintaining good skin health, and treating flare-ups early. Regular veterinary check-ups and ongoing skin care may help reduce the risk of recurrence, especially in dogs prone to repeated infections.
Outlook
Most bacterial skin infections respond well to treatment, especially when diagnosed early and any underlying cause is addressed. Some dogs may be prone to recurring infections and need long-term management, but with appropriate care, the outlook is generally good.