Skip to main content

Why do dogs stick out their tongues? Here’s what vets say about the ‘blep’

A dog with their tongue out may be cute, but what does that 'blep' really mean?

Whether you first heard the term ‘blep’ on the internet (it is meme-worthy, after all), or are learning of it for the first time, you’re in for a treat. Bleps are positively adorable!

The term started gaining online traction in the late 2010s, though it’s no less popular today. The common canine behavior it’s based on, however, is a habit as old as time: sticking out a tongue. Yep, a dog with its tongue out is enough to break the internet!

It’s pretty dang cute, after all, but it’s not always easy to figure out why a dog’s tongue is sticking out. Don’t worry though, pet parents–this is a great place to start! This is everything you need to know about bleps and what they mean:

Dominika Roseclay/Pexels

What is a blep? How about a mlem?

Besides being one of the most popular terms used in pet-related social media, a ‘blep’ refers to when an animal sticks their tongue out of its mouth only slightly. Braxton’s Animal Works describes the action as “leaving the tongue, usually the tip, outside the mouth unconsciously.” Many pet owners will notice it while their buddy is sleeping, or even after!

Of course, not every incident of tongue-sicking-out is considered a blep. Another popular online term–‘mlem’–refers to the act of sticking out the tongue as if the dog is licking…or at least in a licking-type motion. Lastly, a dog’s tongue could just hang out of its mouth completely, though the internet hasn’t coined a phrase for that yet!

Should I be concerned if my dog sticks out their tongue?

As startling as it can be to find your furry friend chilling with their tongue outside of their mouth, you shouldn’t need to worry. Most reasons for a dog blepping are totally harmless! Still, Dr. Holly Ahlgrim of DoveLewis Veterinary Emergency and Specialty Hospital told The Dodo that a veterinary examination may be a good idea if this is a new behavior for your pup. Needless to say, you should also seek support if your buddy seems at all uncomfortable. Besides, it can bring you peace of mind to know what’s going on with your furry friend.

Once you have a ‘diagnosis’–remember, there may be no problem at all to identify–you can make sure your dog stays as comfortable as possible. Hydration is key for blepping pups! Having the tongue resting outside of the mouth can lead to immense dryness at times, so investing in a water fountain for your pet might be a smart idea.

As Dr. Linda Simon, MVB, MRCVS, explained to Wag!, there are times when a dog’s tongue protrusion can’t be prevented or fixed. Luckily, these tend to be the times when it also causes no discomfort–like with Hanging Tongue Syndrome. That’s just one reason why dog’s blep, though, so keep on reading!

A German Shepherd puppy sticks out their tongue

Why do dogs stick out their tongues? Here’s what experts have to say

Maybe you only see the tip of your dog’s tongue after they nap, or maybe it’s hanging completely out 24/7. As you can probably guess, these different situations have different causes!

Relaxation can cause the tongue to extend out of the mouth

Odds are, your blepping pup is just incredibly relaxed, exactly like when a person’s mouth falls open during sleep. It could be a blep or a full-on tongue hanging there. This is probably what’s going on if you notice your dog’s tongue during or after their naps, but it could happen anytime.

Older dogs might be more likely to blep from relaxation if they’ve started experiencing any age-related muscle decline. Neuropathy and other neurological issues can also contribute. As Dr. Ahlgrim suggested, it’s a good idea to visit the vet if this is a new or sudden behavior.

Hanging Tongue Syndrome is self-explanatory, but it’s nothing to worry about

Some dogs may also suffer from Hanging Tongue Syndrome, which is exactly what it sounds like. Pilchuck Veterinary Hospital’s Dr. Kevin Wilson explains to The Seattle Times that this can have either genetic or non-genetic causes, most of which aren’t cause for concern.

A lot of the dogs who deal with Hanging Tongues are brachycephalic, or “smoosh-faced.” These are breeds like Pugs, Shih-Tzus, and Bulldogs, though the list is much longer than these three. As Dr. Wilson said, “These dogs have functional tongues, but, because of genetics, the tongue may be too large for the oral cavity, an abnormal jaw bone doesn’t support the tongue or missing teeth allows the tongue to slip out through the gap.” If it’s genetic, you’ll likely notice it when your dog is still young.

Dental issues can also be a cause of tongue protrusion

Of all the non-genetic causes of Hanging Tongue, or even regular blepping, dental problems are the most common. Dr. Wilson explains that, when a dog is missing teeth or even just support in the lower jaw, the tongue can roll or hang out of the mouth. Of course, it’s a good idea to have these dental concerns addressed.

By keeping an eye on your dog’s blepping habits and their general health, you can ensure they stay healthy and comfy while remaining as cute as can be. Then you can snap as many photos as possible!

Editors' Recommendations

Gabrielle LaFrank
Gabrielle LaFrank has written for sites such as Psych2Go, Elite Daily, and, currently, PawTracks. When she's not writing, you…
Which fruits can my dog eat? Here’s what vets say about these 10 fruits
Fruits safe for your pup to eat: Here's what dog owners need to know
Weimaraner sniffing strawberries in a person's hands

Not all human foods are safe to share with your canine friends, so it's important to do your research before offering your dog a bite. Luckily, we've done a lot of the research for you, so all you need to do is read on to discover which fruits are safe for dogs. A few of the answers may surprise you.
So, what fruits can dogs eat? Here's what veterinarians say about these 10 commonly found fruits. Before you know it, you and your pup will be ready for a trip to the farmer's market!

Can dogs eat apples?
You'll be happy to know that apples are just as nutritious for our dogs as they are for us. Even though dogs may not like certain kinds of apples, all varieties of this fruit are safe to share. Apples are full of vitamins A and C, though apple skin can cause stomach upset due to its high fiber content. A slice or two is a perfect daily amount, depending on your dog's size.
Can dogs eat grapes?
Unlike apples, grapes are absolutely not safe to give to your dog. Though veterinarians are still figuring out why this fruit is toxic to dogs, it's proven that grapes and raisins cause distressing symptoms in canines, even in small amounts. In severe cases, kidney failure and death can occur -- so don't risk it!

Read more
Mini Aussie: What to know about this adorable breed
What happened to the mini Aussie? Here's exactly what happened to the breed
Mini American shepherd lying down

You likely came here looking for information on the mini Aussie. We’re sorry to disappoint you with this interesting plot twist: There’s no such thing as a mini Aussie, at least not anymore. The breed is recognized as the mini American shepherd these days — a more accurate name because the dogs were developed in the U.S. and not Down Under.

Name games aside, these affectionate dogs are some of the most loving. Though mini American shepherds have a long history as herding animals, the breed currently and most commonly takes on the role of "human’s best friend" these days. Is a mini American shepherd the right dog for you? Read on.
The history of the mini American shepherd
The history of the mini American shepherd can feel confusing, primarily because of the name. Mini American shepherds are still commonly referred to as "mini Aussies," a name they haven’t had since gaining American Kennel Club (AKC) recognition in 2015.

Read more
Sorry Labs, you’re no longer America’s favorite dog (here’s what replaced them)
The French bulldog is now America's favorite pure breed
A French bulldog holds a leash in their mouth while standing in the grass

Every year, the American Kennel Club (AKC) releases a list of the most popular breeds in America. For 31 times in a row, the Labrador retriever stubbornly held onto the number one spot, like a dog with a chew toy. However, this breed has finally been ousted and slipped to number two while the adorable French bulldog secured the top. The 2022 most popular dog breeds shook things up, but why has this changed?

Why are Frenchies so popular?
The Lab continued to reign as number one for so long, likely because this breed is known for being friendly and versatile. What better pooch for a family? But as people, especially younger adults, continue to flock to cities, big family-oriented dogs might become less popular (though we should note that the top 10 still includes many large dogs).

Read more