Often a child learns to bite in a playful manner or while teething. Family members may even consider this behavior amusing and cute. They encourage biting by laughing at the child and playfully biting back. Soon the child will see biting as an effective way to get attention. At around the age of 2 when a child's communication skills are limited, biting is a way to communicate anger and frustration.
Toddlers express their anger by biting rather than by verbal communication.
You can see this when another child takes away a toy. The child reacts to the situation by biting because they can't express it any other way. The child might not understand why they should not bite others but needs to learn that such behavior is unacceptable. Time-Out is an effective method of dealing with a biting toddler. Then place him in a crib, playpen or chair for a determined amount of time.