If your baby is teething, make sure to always have a cool teething ring or washcloth on hand so he or she will be less likely to sink teeth into someone’s arm
Avoid situations in which your child can get irritable enough to bite. Make sure that all of your child’s needs – including eating and nap time – are taken care of before you go out to play. Bring along a snack to soothe your child if he or she gets cranky from being hungry.
As soon as your child is old enough, encourage the use of words (“I’m angry with you” or “That’s my toy”) instead of biting. Other ways to express frustration or anger include hugging a stuffed animal or punching a pillow. Sometimes, shortening activities or giving your child a break can help prevent the rising frustration that can lead to biting and other bad behaviors.