The Blep (Tongue Sticking Out)

The Science Behind It

A "blep" is internet shorthand for the endearing sight of a cat sitting with just the tip of its tongue protruding from its mouth. Despite looking comical, it has perfectly ordinary explanations rooted in feline anatomy and behaviour. The most common cause is simple distraction during grooming: a cat extends its tongue to lick, then something interrupts it — a noise, a movement, a passing thought — and it briefly forgets to retract the tongue, leaving it hanging out.

A cat's tongue is covered in backward-facing barbs called papillae, which it uses like a comb. Because grooming is such a frequent, semi-automatic activity, these little interruptions happen often, and a relaxed cat simply doesn't bother to tidy the tongue away immediately.

What It Means for You

In most cases a blep is a sign your cat is deeply relaxed and completely at ease. A cat only lets its guard down like this when it feels safe. You will often notice a blep when your cat is:

• Dozing or half-asleep in a comfortable spot
• Interrupted mid-groom and too content to bother finishing
• Engaging its flehmen response, sampling an interesting scent
• Simply relaxed, with a slightly slack jaw

Some cats blep more than others, and in flat-faced breeds such as Persians a slightly protruding tongue can be a normal quirk of their facial structure.

When to Be Concerned

An occasional blep is completely harmless. However, a tongue that hangs out persistently, or is paired with drooling, bad breath, pawing at the mouth, or reluctance to eat, is a different matter — these can indicate dental disease, mouth pain, or nausea. Persistent panting or open-mouth breathing in a cat is never normal and warrants urgent veterinary attention, as cats, unlike dogs, rarely pant. If your cat suddenly cannot keep its tongue in, have its mouth checked.