Why Does My Toddler Bite When Excited or Frustrated?

The short answer: a bite needs a calm, firm, immediate answer every time, and no drama. Most toddlers bite from big feelings that arrive before the words.

Teeth in your shoulder during a cuddle, or a call from nursery about “a biting incident”. Biting is one of the most upsetting toddler behaviours for parents, and many feel ashamed, as if the bite says something about their parenting.

Start by putting the guilt down. It usually doesn’t. My view: a bite needs a calm, firm, immediate answer, every time, and no drama. Not a lecture, not shame, and never a bite back. A toddler learns more from the same short response given fifty times than from one big scene. The American Academy of Child and Adolescent Psychiatry notes that biting and fighting behaviours “are fairly common and often appear by the child’s first birthday” (AACAP). This guide is about what is behind the bite, and what helps.

Why toddlers bite

A toddler does not bite for one reason. Common ones include:

• Big feelings, few words. Frustration, anger or even huge excitement can spill out through the mouth when words are not ready yet.
• Teething. Sore gums can make chewing and biting feel good.
• Exploring. Toddlers learn with their mouths. Biting a shoulder is one way of finding out what happens.
• Power and attention. The AACAP notes that biting “can be a way for a child to test his or her power or to get attention.” A bite gets a very big reaction, very fast.
• Crowding and overwhelm. Busy rooms, too many children, too much noise. Many nursery bites happen at crowded, tired times of day.
• Feeling threatened. A child whose toy is grabbed, or who is pushed, may bite to defend themselves.

Knowing which one is most common for your child helps you choose the right response.

In the moment

1. Stay calm and act quickly. Firmly and calmly say: “No biting. Biting hurts.” Few words, low voice.

2. Comfort the person who was bitten first. If it was another child, turn to them, check they are okay, and comfort them. If it was you, put your child down and step back: “Ouch. That hurt me.”

3. Do not bite back. The AACAP is clear: “Do NOT bite a child to show how biting feels.” Biting back teaches that biting is what people do when they are upset.

4. Change the place. A short break, close to you, away from the other child or from the game. Very often the place itself was the trouble: too crowded, too loud, too exciting. Not a long punishment. Just a pause somewhere calmer.

5. Come back with a “yes”. When your child is calm: “You were angry. You can say ‘Stop!’ or stamp your feet.” Or, for an excited biter: “You can squeeze me tight. Teeth are for food.”

In the days after

Keep a short biting diary. Time, place, who, what happened just before. A pattern often appears within a week: late afternoon, crowded play, toy disputes, overtiredness.

Change the setting. If bites happen at crowded times, a quieter space, more adult supervision, or fewer toys to fight over may prevent many of them.

Give the mouth something to do. For a teething or exploring toddler, a safe teething toy or crunchy snack can help.

Give words, every day. Name feelings in calm moments: “You’re frustrated.” “You’re so excited!” The more words a toddler has, the less they need their teeth.

Notice gentle moments. “You were cross and you said ‘No!’ instead of biting. Well done.” Children grow toward what we notice.

When it happens at nursery

Most childcare settings see biting regularly. It helps to:

• ask staff when and where the bites happen;
• agree a shared, calm response, so your child hears the same message at home and at nursery;
• ask what they are doing to reduce crowding or tiredness at hard times;
• remember that the other child’s parents may be upset. A short, kind word, if you meet them, can help: “I’m so sorry. We’re working on it.”

About your own feelings

Being bitten hurts, physically and emotionally. It is normal to feel angry or embarrassed. If you notice yourself about to shout or grab roughly, put your child down somewhere safe and step back for a moment. A calm response, even if it is a few seconds late, works better than an angry one.

If you are parenting alone, a biting phase can feel very lonely, especially if nursery calls are frequent. Remember: you are asked to do your role, the same calm response every time, not to make the biting stop by tomorrow. Biting is common, and it passes.

The excited biter

Some toddlers bite most when they are happiest: in a cuddle, a tickle game, a rough-and-tumble on the floor. The excitement climbs faster than their body can handle it.

It helps to slow the game down before it peaks. Lower your voice, soften your movements, and offer another way to show big love: “Squeeze my hand as tight as you can!” or “Give me a big bear hug.” If a bite comes anyway, end the game calmly, and start it again later, a little gentler.

When to get help

The AACAP advises that “If these techniques or interventions are not effective, parents should talk to their pediatrician or family physician.” Talk to your child’s doctor or health visitor too if biting continues past age 3 or 4, is very frequent, causes serious injuries, or comes with other worries about speech, play or development.

This week

For seven days, keep the short biting diary. At the end of the week, circle the most common situation. Next week, change one thing about that situation: earlier nap, quieter space, a teething toy, or more words for feelings.

Biting is usually a phase. Your calm, repeated response is part of how it passes.

---

Next step

Look at one real moment. Answer a few calm questions about what happened just before the bite, and get a 7-day sheet built from your answers. What happened before the meltdown? →

Sources

• American Academy of Child and Adolescent Psychiatry. Fighting and biting. Facts for Families. aacap.org