A cat bleps when the tip of its tongue briefly peeks out past its lips. A familiar, short blep in a cat that otherwise seems well is often harmless, but the behavior is informal—not a diagnosis. A tongue that newly sticks out, stays out, or appears with signs of mouth pain or illness warrants a call to your veterinarian.
What does “blep” mean?
“Blep” is an informal term for a tongue that rests visibly beyond a cat’s lips, usually without moving. It is different from a “mlem,” an active lick. Neither word is a veterinary diagnosis.
A cat may show its tongue while relaxed or asleep, after being interrupted during grooming, or while playing or concentrating. These are possible contexts, not proof of why a particular cat is doing it. A curled upper lip and open-mouthed scent sampling can instead be the flehmen response—a way of investigating a smell. There is no established link between blepping and thirst.
Is it normal for cats to sleep with their tongue out?
It can be. A relaxed jaw during sleep may allow a little of the tongue to slip out. If this is brief and familiar for your cat, and there are no other changes, it is generally less concerning than a new or persistent protrusion. What is usual for your cat matters more than a photo or a single moment.
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When can a sticking-out tongue signal a health problem?
Oral disease is one possibility, particularly if the tongue stays out or the behavior comes with other symptoms. The Merck Veterinary Manual describes mouth disorders caused by infection, injury, tumors, and inflammatory conditions; gum disease is the most common oral problem in cats. Mouth inflammation can cause bad breath, drooling, reduced appetite, or pawing at the mouth.
Tongue inflammation, called glossitis, can result from several causes, including irritation, wounds, burns, infection, a foreign object, or other disease. Drooling and reluctance to eat are common signs. Dental pain can also be difficult to spot at home: disease may be hidden below the gum line, and a cat may continue eating despite discomfort.
Contact your veterinarian if the tongue protrusion is new, persistent, or accompanied by signs such as:
- Drooling, bad breath, red or bleeding gums, or pawing at the mouth or face
- Reduced appetite, difficulty eating or swallowing, dropping food, or chewing on one side
- Weight loss or a change in grooming or general behavior
Seek urgent veterinary advice for breathing difficulty, excessive panting outside a brief stress episode, marked swelling, inability to eat or swallow, or suspected toxin exposure. Do not give human medicines or try to remove an embedded object yourself. Avoid forcing open a painful mouth.
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What should I observe before calling the vet?
Note whether the blep is brief or persistent and whether it is a long-standing habit or a new change. Without handling a sore mouth, observe your cat’s eating and swallowing, breath odor, drooling, grooming, breathing, and any visible gum redness or bleeding. Also note pawing at the face, food dropping, one-sided chewing, or weight change. These details can help your veterinarian decide what examination is needed; they do not establish a diagnosis.
Some dental disease is not visible above the gum line. A veterinary examination can assess the teeth, gums, tongue, and other possible causes of a persistent protrusion.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Can oral care prevent dental problems?
Preventive care supports oral health, but it does not diagnose or treat a blep. The Feline Veterinary Medical Association recommends daily brushing with a soft brush and cat-safe toothpaste to help remove plaque. It also notes that foods, treats, or water additives bearing the Veterinary Oral Health Council (VOHC) seal help reduce plaque buildup; ask your veterinarian which option suits your cat. There is no supported brand ranking or head-to-head comparison among these formats.
The FelineVMA’s 2025 brochure says up to 85% of cats will already have signs of periodontal (gum) disease by two years of age. That figure concerns gum-disease signs, not blepping, and does not mean that a blep predicts dental disease. The brochure says veterinary checkups every 6–12 months can help catch dental problems; discuss the right schedule for your cat with its veterinarian. It also states: “Dental cleaning without anesthesia is not safe or effective.”
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