Although it is very common in a stage of children, the fact that it is so recurrent or its only way of expressing itself can be an emotional problem that you must attend to.
Many children begin to bite aggressively between the ages of one to three, and this is a way to get attention or just a nuisance to their teething. At approximately three years of age, children begin to have more contact with other children and this also causes normal friction that causes them to defend themselves, but as they adapt to this new socialization, this must stop.
Why do they bite?
Conflicts begin when they realize that at school they are no longer the center of attention and their mouth is related to showing affection. Also, they don’t realize that when they bite they can do damage. Some children bite because they feel unhappy, anxious, jealous, or the result of excessive discipline. And when they begin to speak, as there is a way to communicate, the bites and screams tend to disappear. Although also the cause can be the exit of the teeth.
What I can do?
Always say? No? but in a calm but firm tone and with disapproval. Screaming or scolding is not necessary.
Set him apart from other little ones and let him know that you don’t like that attitude and tell him that he can’t play with others for a while.
Explain that biting can do a lot of harm to people.
Never bite him to show him what hurts, that’s trying to calm down aggressive behavior with another.