Dogs lick people for several reasons at once, and most of them are perfectly natural. When you want to understand why dogs lick people, it usually comes down to a mix of affection, communication, curiosity about taste and smell, and a behaviour the dog has learned works. Licking is one of a dog's oldest ways of making contact, and for most dogs it is a friendly, social signal rather than something you need to worry about.
The short answer, then, is that your dog most often licks you because it means you well. But the behaviour has several layers, and some of them are worth knowing so you can read your dog accurately and know when the licking is cosy companionship and when it is a sign of unease, boredom or something you may benefit from guiding in a different direction.
Licking as the dog's social language
Licking is deeply rooted in a dog's nature. Puppies lick their mother around the mouth from a very young age, partly to signal that they are hungry, partly as a soothing, trust-building gesture. That behaviour carries on throughout life, and when your adult dog licks your face or hands, it is drawing on exactly the same repertoire. It is the dog's way of saying that it acknowledges you, feels safe and would like to strengthen the bond between you.
Many dogs also lick one another across the pack as a peaceful signal that eases tension and confirms belonging. When the licking is directed at you, in other words, you have become part of the dog's social circle. That explains why licking often appears in the calm, close moments when you are sitting together, or when you come home after being away. For the dog it is one of the clearest ways of expressing joy and attachment.
Why the tongue often goes for the face and hands
The fact that the dog aims especially for the face and hands is not by chance. The face is where the dog reads you the most, and where many of your scents gather. The hands are the parts of you that have most often touched food, other animals or outdoor smells, and they are therefore a little treasure trove of information. The dog licks in order to taste and smell, and its world is largely built around scents in particular. A single lick gives it a wealth of information about where you have been and what you have touched.
Salt plays a part too. Human skin gives off salts and other substances that many dogs find appealing, and after a walk or a training session the skin can taste extra interesting. There is, then, often a very practical, taste-driven explanation hidden behind the affectionate gesture, and the two things by no means rule each other out.
Licking that is about attention and learned habit
Dogs are quick to learn what works. If your dog licks you and you respond by laughing, talking to it or petting it, then it has got exactly what many dogs are after: your attention. Even a reprimand is a form of attention, and so the licking can become a habit the dog repeats because experience tells it there is something to be gained from it.
That does not mean licking is always a demand for something. But if you find that your dog licks persistently precisely when it wants contact, food or activity, there is a good chance the behaviour has been reinforced over time. If you want to reduce it, the key lies in consistency: refrain from rewarding the licking with a reaction in the situations where you would rather be left alone, and instead give attention when the dog is calm and not licking. The dog gradually learns that calm pays off better.
When licking is self-soothing rather than social
Licking releases calming signals in the dog's body, and the repetitive motion can have a de-stressing effect. That is why some dogs use licking as a way of settling down, a little like the way people can find calm in a rhythmic action. A quiet lick while you are sitting together in the evening is usually just cosy.
If, on the other hand, the licking becomes insistent, frequent or hard to interrupt, it can be an indicator that the dog is bored or under-stimulated. Here the solution is not to scold, but to give the dog something meaningful to spend its energy on. Activities that engage the nose, tongue and brain alike can redirect the urge to lick and at the same time make everyday life richer. A the licking mat is made for exactly that: the dog gets to lick for a long time and with concentration after a tasty topping, and the natural urge is channelled somewhere it can settle down. If you would like more ideas for enriching your dog's day, you can find inspiration in our guide to 5 brilliant enrichment ideas.
What you can read from the dog's other body language
Licking rarely says anything on its own. Always read it alongside the rest of the dog's body language. If your dog licks you with a loose body, soft expression and a wagging tail, it is in all likelihood affection and a wish for contact. If, on the other hand, you see licking combined with tension, yawning, the dog licking its own mouth or an averted gaze, the dog may be in a situation it finds unpleasant and is trying to ease the mood. In that case it is not asking you for contact, but rather signalling that it would like more space.
The same attention applies if the dog suddenly starts licking itself, the furniture or the floor a great deal. Persistent, excessive licking can in some cases be linked to discomfort, itching or unease, and if the behaviour changes markedly with no explanation, it is always a good idea to have your vet take a look at the dog. Licking directed at you as part of daily contact, on the other hand, is normal and simply part of everyday life.
How to set boundaries if you would rather not be licked
Some people enjoy being licked by their dog, others do not, and both are perfectly fine. If you would like to limit it, the approach is kind consistency rather than reprimand. Calmly turn your face or hand away when the dog starts licking, so it does not gain contact from it, and instead praise it when it chooses a different behaviour. Give the dog an alternative it can put its energy into, so the urge finds another outlet.
Rewards play a central role here, because you build the desired behaviour by rewarding calm and self-control. If you choose treats for that work, it makes good sense to go for something made from human-grade ingredients and fresh raw materials, so the reward fits into a well-considered everyday routine. In our Delights Treats you will find treats that are well suited to training and contact, and for the smaller bites or the small dogs you can take a look at mini Delights, where the size suits dogs with a smaller mouth and a more modest appetite.
The link between licking, appetite and a well-fed dog
Some of the licking directed at your hands and mouth is driven by an interest in food. It is not a sign that the dog is starving, but it is a reminder of how strong a dog's relationship with scents and tastes is. A dog that gets well-composed, filling meals draws less of its motivation from the hunt for leftovers and crumbs, and that can make a noticeable difference to how preoccupied it is with what your fingers have touched.
The quality of a dog's daily meals, in other words, carries through into many small everyday details, including those to do with behaviour. If you are unsure what suits your particular dog's life stage, taste and needs best, you can find an overview on our meals landing page and put together a daily routine in which the dog is well fed and content. If you are uncertain how to get the feeding just right, ESSENTIAL FOODS' nutrition advisers are ready to guide you on food and nutrition by phone, chat or email, so you can make the choice on a solid footing.
When it comes down to it, licking from a dog is far more often a gift than a problem. It is the dog's way of telling you that you belong, that it feels safe, and that it wants to be near you. Know the difference between the affectionate lick and the one rooted in unease or boredom, and you have everything you need to meet your dog where it is - and to set loving boundaries on the day the licking gets a little too eager.