Why do children act aggressively?
Aggressive behavior on the part of young children can be one of the most stressful things caregivers experience. Children behave aggressively for many reasons, some of which are developmentally normal and will typically self-resolve. Some other reasons are listed below. An important part of effectively dealing with such behavior is to identify what situations are more likely to trigger aggression in your child so that you can limit his or her exposure to those triggers.
The cause of aggressive behaviors may be due to any or all of the following:
- Self-defense
- Stress
- Lack of routine or a sudden, unexpected change in routine*
- Extreme frustration or anger
- Fear
- An inability to express needs
- A need for attention
- Over-stimulation
- Exhaustion
- Hunger
- Poor diet (sugar, processed foods, artificial colors and flavors)
- Mirroring the aggressive behaviors of other children (and adults) around them
- A chaotic home/daycare/school environment
- Neglect
- Abuse
It is important to become a careful observer so that you can log the situations that seem to correlate with aggression in the child in question.
*When a child is neurodiverse, some stimuli can be truly distressing if not painful and can lead to aggressive behavior.
Regardless of the cause, this can be one of the most challenging things to deal with as a parent or teacher or other caregiver role. Here are some tips for dealing with aggressive behavior in young children.
In the Moment of the Incident
- Stay Calm: Model appropriate behavior by remaining calm. Your child needs you to be a source of stability/co-regulation when they are overwhelmed by emotion.
- Intervene Immediately and Lightly: Step in and stop the behavior physically if necessary (e.g., gently catching their hand or putting your body in between children) while using a firm, clear, but calm voice.
- Use Simple Words: Offer a short, firm verbal correction, such as “No hitting. Hitting hurts” or “We don’t bite”. Avoid long lectures, as children in a high-emotion state cannot process complex information.
- Attend to the Recipient of the Agression: Give the primary attention and comfort to the person who was hurt. This helps the child who did the hitting/biting learn that the behavior doesn’t immediately get them the attention they might be seeking and models empathy.
- Remove the Child (If Necessary): If the child cannot calm down, remove them from the situation to a designated safe space (a “cozy corner” or a time-out spot) where they can calm down, not as a punishment but as a place to regain control. A general guide for a time-out is one minute per year of age.
After the Incident (When Calm)
- Acknowledge Feelings and Teach Words: Once the child is calm, talk about the feelings that led to the incident. You can say, “You were really angry that Timmy took your toy, but it’s not okay to hit”. This helps them name their emotions.
- Teach Alternative Behaviors: Role-play or discuss appropriate ways to handle frustration in the future. Suggest phrases like, “That’s mine,” “I don’t like that,” or “Stop!” instead of lashing out physically. You can also teach calming techniques like deep breathing or hugging a stuffed animal.
- Use Consistent, Logical Consequences: If the aggressive behavior resulted in a loss of privilege (e.g., leaving a playdate), follow through consistently so the child understands the connection between their actions and the result. It is important not to think of or present the response as punishment, but rather an opportunity to course correct, learn, repair, redeem, etc.
- Focus on the Behavior: It is important to clearly focus on the problematic behavior while avoiding shaming or references to the child being a “bad boy” or “bad girl,” etc.
Prevention and Ongoing Strategies
- Identify Triggers: Pay attention to patterns in behavior (e.g., is the child hungry, tired, or over-stimulated?) and avoid those situations when possible. Reference the list above and other situations you have observed.
- Note Positive Behavior: Actively point out when your child is practicing desired behaviors with specific feedback, such as, “I like how you used your words to ask for a turn!”. Do not, however, use other children’s behavior such as, “Notice how Suzy uses her words.”
- Model Appropriate Behavior: Children learn from imitation. Manage your own anger in healthy ways and avoid hitting or biting your child as punishment, as this sends a confusing and counterproductive message.
- Ensure Sufficient Physical Activity: Provide plenty of opportunities for active, physical play to help the child burn off excess energy and tension.
- Limit Screen Time: Screen time should be less than an hour per day, with zero screen time if possible.
- Provide Biting Substitutes: For a child prone to biting, offer a safe alternative like a tough snack or a clean, wet washcloth they can bite into when they feel the urge.
- Meet the Child’s Needs: As you learn what triggers your child, ensure that you address those needs and/or limit environmental stimuli that leads to aggression.
What Not to Do
- Never bite or hit back. It can be tempting to want to teach your child a lesson in how it feels to be the victim of aggression, but when you succumb to a childlike form of communication, you are teaching your child that aggression is the answer to resolving a conflict. Even though it’s difficult, try your best to maintain your composure.
- Avoid exposing your child to violent television or video games. While TV or video violence may not affect some kids, it may greatly influence others who have a tendency to act out aggressively with their friends.
- Do not personalize your child’s bad behavior or shame them for it. Switch your focus towards helping them express themselves in a more appropriate way and follow through when an incident occurs.
Further Tips on Assessing Triggers
Begin by carefully observing your child for cues as to what stimuli or situation brings about aggressive behavior. Keep a log in a small notebook or on a smart phone, etc. Some questions you should ask yourself:
- Who does my child hit, bite or kick? Does he or she do it to one person in particular or multiple people? Does she or he act aggressively in specific situations or in any situation? Does the recipient of the aggression in any way provoke the aggressor?
- What factors seem to cause your child to act out in an aggressive fashion? Is the aggression preceded by intense emotion? Are there patterns? Does he or she act this way when toys or other objects are involved? Or does she or he become aggressive when there is too much stimulation? How long has it been since the child has eaten, slept? Are the child’s needs being addressed by an adult?
- How is his aggressiveness expressed? Is it through angry words or through angry behaviors? Does he become verbally aggressive first and then physically aggressive, or is his first response to strike out and hit? Does it reflect aggression that has been modeled in videos or by other people?
Sometimes aggressive behavior results from multiple factors that combine to cause outbursts. For example, a child is under slept, ate unhealthy/high sugar food, then is asked to share a toy he or she is really fond of. Noticing these patterns and intervening before all the factors are in play, can limit aggressive outbursts.
Summary
Aggressive behavior in kids can feel overwhelming, but it’s often a sign of stress, frustration, a need for connection, or simply not knowing how to express big feelings. In the moment, your calm presence is the most powerful tool—step in quickly, use short phrases like “No hitting. Hitting hurts,” and make sure everyone is safe. Later, help your child name their feelings and practice better ways to cope, like saying “Stop!” or taking deep breaths. Prevent future blow-ups by spotting triggers (hunger, tiredness, too much noise), praising positive choices, and giving plenty of chances for active play. Avoid hitting back or shaming—these teach the wrong lesson. And understand that no matter what you do, all children will occasionally act out.

