Bacterial dermatitis or skin infection (pyoderma) is most of the time triggered by an underlying disease, such as parasites, an endocrine disease or allergies against fleas or food ingredients.
It occurs when the skin’s natural defenses break down with scratching or licking, allowing an overgrowth of common skin bacteria (such as staphylococci).
Other organisms, such as yeast and fungal organisms, can also take advantage of the skin changes and multiply.
Bacterial dermatitis may be generalised or restricted to certain areas as in the case of head and neck. Eosinophilic plaques on the abdomen are permanently licked and can be infected by oral bacteria. Chin acne is also described.
Consult your vet, who will focus on treating the underlying problem and will advise you on managing the condition.