A baby who bites is neither naughty nor badly brought up: biting is a very common behaviour in early childhood. It mostly happens between the first and second birthdays and usually fades by the age of 3 or 4. A calm, brief and consistent response is, more often than not, enough to make it ease off.
This article explains why toddlers bite, how to react in the moment, how to treat a bite and how to prevent the next one, both at home and in childcare. It draws in particular on guidance from Nemours KidsHealth, a paediatric information service reviewed by specialists.
Why do babies bite?
Biting doesn’t have a single cause. The same child may bite for different reasons depending on their age, how tired they are or the situation. Spotting the reason behind it in the moment helps you choose the right response.
Teeth and exploring with the mouth
Before the age of 1, the mouth is a tool for discovery. Your baby nibbles on anything within reach, including a shoulder or a finger. A bout of teething can make this need even stronger. This exploratory nibbling is described in our article on babies who put everything in their mouth.
Discovering cause and effect
Around the age of 1, children test what their actions lead to. They bite, someone cries out, an adult comes running: it’s quite a show. Without meaning to hurt anyone, they may simply want to see it all happen again.
Frustration and a lack of words
This is the most common cause between 1 and 2 years. Your child feels anger, fear or an urgent want, but can’t yet put it into words. The bite stands in for the sentence they can’t say. It often happens when another child takes a toy they had their eye on.
Wanting attention
A child who gets a lot of attention after biting may do it again. It isn’t calculated: they are simply learning what gets a reaction from adults.
Tiredness and overstimulation
Bites are more frequent at the end of the day, in a noisy group or after a missed nap. An exhausted child loses what little self-control they have.
Baby biting: at what age is it normal?
According to Nemours KidsHealth, biting is common mainly between 1 and 2 years. It should stop by around 3 or 4, as children learn to express what they feel with words. It is said to be slightly more common in boys.
Before the age of 1, it’s more a case of nibbling than biting in the true sense. After 4, repeated biting deserves closer attention, especially if it comes with other challenging behaviour.
How to react when your baby bites
Your reaction matters more than any punishment. It should be immediate, short and the same every time.
- Stop the bite calmly: gently detach your child without shouting, look at them and say one simple sentence, such as “We don’t bite, it hurts”.
- Look after the child who was bitten first: comfort them and treat the bite. The attention goes to the child who was hurt, not to the biter.
- Then go back to the child who bit: name their feeling, for example “You were angry, he took your lorry”.
- Offer another way out: saying “no”, “stop” or “that’s mine”, stamping a foot, asking an adult for help.
- Change activity: a book, a song or a quiet game helps your child calm down.
Punishment is rarely useful at this age. If the biting keeps happening, a short, calm time-out can help: KidsHealth suggests about one minute per year of age.
What not to do
- Biting back: this teaches your child that biting is acceptable, since the adult does it too.
- Smacking or shouting loudly: fear adds to the agitation and gives your child no words at all.
- Giving a long lecture: a toddler only remembers one short sentence, repeated every time.
- Laughing or finding it cute: an amused reaction reinforces the behaviour.
- Sticking a label on them: “the biter” can end up becoming an identity your child takes on.
How to treat a child’s bite
Most toddler bites leave a mark without breaking the skin. In that case, all you need to do is reassure the child and clean the area.
- Wash the skin with soap and water, then pat dry.
- Apply a cool cloth if the area swells.
- See a doctor if the bite is deep, bleeds or breaks the skin, or if warm redness spreads over the following days.
How to prevent biting day to day
Prevention starts with observation. Note when and where the bites happen: end of the day, squabbles over a toy, too many children together. More often than not, the same pattern repeats itself.
- Anticipate high-risk moments: stay close during group play, especially when your child is tired.
- Have duplicates: two identical toys cut down on squabbles over who owns what.
- Offer something to chew: a clean teething ring meets the need to chew during teething.
- Set up a quiet corner: a baby play mat on the floor, a few books and a comforter offer a refuge when the group gets too noisy.
- Praise good behaviour: point it out when your child asks instead of grabbing.
- Give them words: naming feelings throughout the day prepares your child to say them rather than bite.
Language is your best ally. The more words a child has, the less they need to use their body. Our article on language development goes through these stages in detail. Handling big emotions is covered in our guide to emotional regulation before the age of 3.
When your baby bites at nursery or at the childminder’s
Biting is common in group settings, where several toddlers share the space and the toys. Childcare professionals are used to it. The most helpful thing is to talk with them: when the bites happen, which sentence they use, how you respond at home.
Responding the same way at nursery and at home helps your child grasp the rule more quickly. If your child has been bitten, the setting will let you know. It usually won’t give the other child’s name, to avoid tension between families.
A biting phase often coincides with a change: starting childcare, the birth of a younger sibling, moving house. The first weeks of settling in are covered in our article on settling in at nursery.
When should you talk to a professional?
A one-off bite doesn’t call for an appointment. Talking to your doctor or the PMI (France’s mother and child health service) is useful in several situations:
- the biting continues beyond the age of 3 or 4;
- it becomes more frequent or harder over the weeks;
- it comes with other difficulties: language delay, very intense tantrums, withdrawal;
- you feel overwhelmed and the situation is weighing on family life.
The refusal and defiance that often go with this phase are covered in our article on toddlers and the word “no”.
In a nutshell
- Biting is common between 1 and 2 years and usually fades by 3 or 4.
- It mainly reflects a need to chew, a discovery or a feeling without words.
- React calmly, look after the bitten child first, then offer another way out.
- Never bite back.
- Watch for high-risk moments to prevent bites rather than deal with them afterwards.
Sources
- Nemours KidsHealth, “Biting”, medically reviewed June 2022.
