Bacterial skin infection occurs when the skin's surface has been broken, the skin has become injured due to chronic exposure to moisture, the normal skin bacteria have been altered or changed, the blood flow to the skin has become impaired, or the immune system has been suppressed.
A specific type of pyoderma is skin fold pyoderma that develops in skin folds, such as facial folds, lip folds, tail folds, and in the groin or armpits.
It may develop between the mammary glands in females that have had multiple litters of pups.
It may also occur secondary to obesity when adjacent skin folds upon itself.
The skin folds allow the surface of the two adjacent areas to lie in close contact, creating a warm, humid environment.
In the presence of moisture, the normal skin bacteria then multiply, creating an infection in the fold.
Pyoderma is often secondary to allergic dermatitis and develops in the abrasions on the skin's surface that occur as a result of scratching.
Puppies often develop puppy pyoderma in thin-haired areas such as the groin and underarms.
Fleas, ticks, yeast, or fungal skin infections, thyroid disease or hormonal imbalances, heredity, and some medications (immunosuppressive drugs and higher doses of steroids) may increase the risk of your pet developing pyoderma.