Why do dogs lick their lips or face during grooming?

When a dog repeatedly licks their lips, flicks their tongue out, or licks their face during grooming, it's usually a form of communication, not bad behavior.

Most often, it means one of the following:

Mild stress or uncertainty

Grooming involves new sensations - sounds, vibrations, being handled in sensitive areas - so lip licking is commonly a calming signal. It's the dog's way of saying:

"I'm not totally comfortable, but I'm trying to stay calm."

This is very normal and expected, especially:

During face or head work

When dryers or clippers are introduced

With puppies or first-time grooms 

Self-soothing behavior...

Licking releases endorphins and helps dogs relax. Think of it like a nervous habit — similar to a person tapping their foot or taking a deep breath.

Anticipation or attention...

Some dogs lick when they're focused or waiting for what's next. This is common in dogs that are cooperative but alert.

When is licking not a concern?

Lip licking by itself is not a sign of aggression and usually not panic. If the dog's body is otherwise relaxed - loose muscles, soft eyes, normal breathing - it's just mild communication.

When should we pay closer attention?

If licking is paired with:

Tense body posture

Whale eye (showing the whites of the eyes)

Freezing or pulling away

Heavy panting or trembling

Then the dog may be more stressed,

and we adjust our handling, take breaks, or change our approach.

Bottom line...

Lip licking during grooming is a dog's way of coping and communicating. It's very common, and experienced groomers watch for it so we can keep the dog as comfortable and safe as possible.