Cat Drooling: When It's Nothing and When It's Something

In this guide

A little drool while your cat is deeply relaxed and kneading a blanket is usually affection, not illness. Drooling that appears out of nowhere, especially with other symptoms, is a different story.

Normal, happy drooling

Some cats drool briefly during intense purring, kneading, or petting sessions, particularly around the chin and chest. This is harmless and tends to be consistent across similar situations, such as every time your cat settles on your lap.

When drooling signals a problem

• Dental disease, including tartar buildup, gum inflammation, or a broken tooth, extremely common in cats over five years old
• Nausea, often paired with lip smacking or vomiting
• Something stuck in the mouth, such as a thread, bone splinter, or plant fibre
• Oral ulcers, sometimes linked to viral infections
• Exposure to a toxic plant or chemical
• Heatstroke during peak summer months
• Kidney disease in older cats, where drooling can accompany reduced appetite

What to check at home

• Look inside the mouth for redness, swelling, or a visible object, if your cat allows it safely
• Smell the breath, a foul odour often points to dental disease
• Note whether the drool has blood in it
• Check whether your cat has been near household plants, cleaning products, or lily-scented items, since some plants are toxic to cats

When to see a vet

New, persistent, or heavy drooling deserves a check-up, especially alongside bad breath, reduced appetite, pawing at the mouth, or lethargy. Dental disease in particular is easy to underestimate but causes real pain, and treating it early spares your cat months of silent discomfort.

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