Skin Diseases with Pus Drainage in Cats

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This table lists diseases in which the predominant sign is skin infection or pyoderma on or beneath the skin. Pyoderma is characterized by pus, infected sores, scabs, ulcers of the skin, papules, pustules, furuncles, boils, and skin abscesses. Some cases are caused by self-mutilation and are late consequences of scratching and biting. Other pyodermas are specific skin diseases that occur by themselves.

• Candidiasis (thrush): Moist white plaques that bleed easily when rubbed. Most common on mucous membranes.
• Cellulitis or abscess: Painful, hot, inflamed skin or pockets of pus beneath the skin. Often caused by self-mutilation. Look for an underlying cause, such as an itchy skin disorder, foreign body, or bite or puncture wound.
• Feline acne: Pimplelike bumps on the underside of the chin and edges of the lips. May be associated with plastic or rubber food and water dishes.
• Impetigo: Pustules on the abdomen and hairless skin of young kittens.
• Mosquito bite hypersensitivity: Crusty sores with erosions and scabs over the bridge of the nose and tips of the ears.

This article is excerpted from “Cat Owner’s Home Veterinary Handbook” with permission from Wiley Publishing, Inc.