Your dog licks your hand when you get home. They lick your face when you sit on the sofa. They lick your feet, your arms, and occasionally the air. It’s one of the most universally recognisable dog behaviours — but what does it actually mean? If you’ve ever wondered, “Why does my dog lick me?”, this guide explains.
The short answer is: it depends. Licking serves multiple purposes for dogs, and the meaning can shift depending on the context, the target, and the intensity. In veterinary behaviour, we pay close attention to licking because it can tell us a lot — from a happy, affiliative greeting to “something doesn’t feel right.”
At a glance:
Usually normal: most licking is affection and bonding, greeting, information-gathering, or seeking your attention.
The chemistry: calm, friendly contact is linked to a rise in feel-good neurochemicals in both dog and owner.
Context matters: relaxed licking during a cuddle is very different from anxious lip-licking or frantic surface-licking.
A possible health sign: new or excessive licking of surfaces can point to nausea or gut discomfort, and licking themselves raw always needs a vet.
See your vet first if: licking is new, more intense, aimed at surfaces, or causing damage to the skin.
The behaviour angle: compulsive or anxiety-driven licking is best assessed alongside your vet.
Why Does My Dog Lick Me?
Licking is a deeply rooted behaviour in dogs. Puppies lick their mother’s face to solicit food and attention, and this early behaviour carries into adulthood in modified forms. Research into dog-human communication has identified several functions of licking:
- Affection and bonding. When dogs interact positively with the people they’re attached to, both species experience a rise in feel-good neurochemicals — including oxytocin, beta-endorphin, and dopamine. Licking during calm, relaxed contact likely reflects and reinforces this bond.
- Greeting and appeasement. Research has found that lip licking and face licking are common components of a dog’s greeting behaviour. When your dog licks you enthusiastically at the door, they’re expressing something between “hello” and “I come in peace.” Studies have shown that lip licking in dogs functions as an appeasement signal — a way of communicating non-threatening intentions.
- Information gathering. Dogs experience the world partly through taste and scent. When they lick your skin, they’re collecting information about where you’ve been, what you’ve eaten, and how you’re feeling. Human skin is also mildly salty, which some dogs find appealing. Beyond salt, some dogs simply like the taste of whatever is on your skin – lotion, food or sweat. One safety note: a few human skin treatments are dangerous if your dog licks the treated area. Topical hormone or HRT gels can disrupt a dog’s own hormones, calcipotriol psoriasis creams are toxic in tiny amounts, and 5-FU (fluorouracil) skin-cancer creams such as Efudex have proved fatal to dogs even in small amounts – so keep your dog away from freshly treated skin and follow the product’s pet-safety advice.
- Attention-seeking. If licking gets a response — whether that’s laughter, talking, or pushing them away — your dog may learn that licking is a reliable way to engage your attention.
- Response to your emotions. Research has shown that dogs approach and nuzzle or lick people who are crying, even strangers. While we can’t definitively say dogs feel empathy in the way humans do, their behaviour is consistent with responding to emotional cues in others.
When Licking Means Something Else
This is where the veterinary behavioural perspective becomes particularly important. Most licking is harmless communication, but licking can also be a clinical sign — and knowing what to look for can make a real difference to your dog’s welfare.
Licking as a Sign of Nausea or Pain
Dogs who are nauseous, experiencing acid reflux, or in pain will often lick excessively — sometimes their own lips, sometimes surfaces like floors, walls, or furniture. This behaviour, known as excessive licking of surfaces (ELS), has been linked in veterinary research to gastrointestinal conditions including delayed gastric emptying, irritable bowel syndrome, chronic pancreatitis, and giardiasis.
If your dog has developed a new habit of licking surfaces — particularly if it’s intense, hard to interrupt, or accompanied by other signs like gulping, swallowing, or changes in appetite — this warrants investigation by your vet – it deserves a proper look rather than being brushed off as a harmless quirk.
When a Dog Licks Out of Anxiety or Compulsion
Repetitive lip licking without food present is a well-documented stress signal in dogs. Research has shown that dogs lick their lips more frequently in threatening or uncomfortable situations, and this can be a subtle early warning sign that a dog isn’t at ease. Licking can also be self-soothing: the action itself releases calming neurochemicals, so some dogs lick themselves, surfaces or you as a way to settle in mildly stressful or conflicting moments – a displacement behaviour.
In some dogs, licking can become compulsive — excessive self-licking leading to sore patches or hair loss (sometimes called acral lick dermatitis), or persistent, repetitive licking of people or objects that goes beyond normal social behaviour. When licking reaches this level, it usually reflects an underlying emotional state — anxiety, frustration, or chronic stress — that needs addressing at the root, not just at the surface. Under-stimulation can feed into this too: a dog with too little to do may lick themselves, objects or you simply as an outlet, which is one reason the enrichment ideas below matter.
Licking Themselves Raw
If your dog is licking a specific area of their own body to the point of causing damage, this always needs a veterinary assessment first. The cause may be dermatological (allergies, infection, parasites), orthopaedic (pain in the joint or limb being licked), neurological, or behavioural. Often, it’s a combination. Getting the diagnosis right requires looking at the whole picture.
What to Do When Your Dog Licks You
If your dog’s licking is a normal social behaviour that you’d simply like to manage:
- Redirect rather than punish. If you don’t want your dog licking your face, calmly stand up or turn away, and reward them when they offer a different greeting behaviour. Pushing them away can be reinforcing.
- Give them appropriate outlets. Lick mats, stuffed Kongs, and frozen enrichment activities can satisfy the licking urge in a way that’s also mentally enriching.
- Pay attention to the context. Happy, relaxed licking during a cuddle is very different from anxious lip licking during a thunderstorm or frantic surface licking after a meal. Context is everything.
When Your Dog’s Licking Needs Professional Help
See Your Vet First
Always start with your vet if your dog’s licking has changed — if it’s new, more intense, directed at surfaces, or causing damage to their own skin. Your vet can investigate pain, nausea, skin conditions, and other medical factors that may be driving the behaviour.
When a Behavioural Assessment Helps
Once medical causes have been ruled out or are being treated, a behaviour assessment may be the right next step if:
- The licking is excessive, compulsive, or impossible to interrupt.
- Your dog is licking themselves raw, creating sore patches or hair loss.
- The licking is accompanied by other signs of anxiety — panting, pacing, difficulty settling, or avoidance behaviours.
- Your vet suspects a behavioural component alongside a medical one.
Cases like these benefit from a team that can work across the medical-behavioural boundary. At Second Nature Behaviour, our team includes a Veterinary Behaviourist who can assess the full picture — your dog’s physical health, emotional wellbeing, and behaviour — and collaborate with your vet to develop a plan that addresses all the contributing factors. This is particularly important for licking behaviours, where the medical and emotional drivers are often intertwined.
The Bottom Line
When your dog licks you, they’re usually telling you something positive — that they’re happy to see you, that they feel safe with you, or that they’d quite like a bit of your attention. It’s one of the many ways dogs have adapted to communicate with us across species.
But licking can also be a window into your dog’s physical and emotional health. If the pattern changes, the intensity increases, or it starts causing harm, it’s worth paying attention — and getting the right expertise involved.
If you’re concerned about any aspect of your dog’s behaviour, Second Nature Behaviour can help. Get in touch with us for advice, or ask your vet to refer you for a behaviour consultation.
References & Further Reading
Bécuwe-Bonnet, V., Bélanger, M.-C., Frank, D., Parent, J. & Hélie, P. (2012). Gastrointestinal disorders in dogs with excessive licking of surfaces. Journal of Veterinary Behavior, 7(4), 194–204. https://doi.org/10.1016/j.jveb.2011.07.003
Custance, D. & Mayer, J. (2012). Empathic-like responding by domestic dogs (Canis familiaris) to distress in humans: an exploratory study. Animal Cognition, 15(5), 851–859. https://doi.org/10.1007/s10071-012-0510-1
Frank, D., Bélanger, M.-C., Bécuwe-Bonnet, V. & Parent, J. (2012). Prospective medical evaluation of 7 dogs presented with fly biting. The Canadian Veterinary Journal, 53(12), 1279–1284.
Odendaal, J.S.J. & Meintjes, R.A. (2003). Neurophysiological correlates of affiliative behaviour between humans and dogs. The Veterinary Journal, 165(3), 296–301. https://doi.org/10.1016/s1090-0233(02)00237-x