Why does a dog lick its owner's hands?

A token of love and affection

Licking is a natural way for a dog to show affection, trust, and gratitude. It's a gesture that tells you you're an important part of their life.
It often happens during petting; by licking, the dog seeks to strengthen the emotional bond between you.

Try to calm down

In stressful or tense situations, some dogs begin licking their owners' hands to calm themselves. This behavior helps them cope with anxiety, fear, or insecurity.

Attention seeker

When a dog needs contact, play, or care, licking can be a clear sign. If it feels it isn't getting enough attention, it may use this gesture to "remind" you that you're there.

Exploration through taste and smell.

Dogs have an extremely developed sense of smell. The skin on their paws often retains scents from food, cosmetics, or other people. For dogs, this is a way to gather information and learn about the world around them.