Why does my dog keep gently biting my hand?

A dog that keeps gently biting its owner’s hand usually formed the habit during play and interaction. When young, dogs practice hunting and other games through play. If the owner often uses their hands to play with the dog, the dog may develop prey behavior and gently bite the hand, and the owner’s indulgent reaction reinforces this behavior. Also, dogs aged 4 to 6 months are in the teething stage and, because their gums feel uncomfortable, often chew things, including the owner’s hands. When the dog does this, if the owner keeps indulging it or seems happy, the dog may treat the behavior as a way to please the owner and form the habit of gently biting the hand.