Toddler Hitting, Kicking, and Aggressive Behavior
The short answer
Physical aggression (hitting, kicking, throwing, pushing) is developmentally normal in toddlers ages 1-3. Research shows that physical aggression actually peaks around age 2 and then decreases as children develop language and emotional regulation skills. Toddlers are not being "bad" - they are experiencing intense emotions with zero ability to regulate them. The prefrontal cortex (responsible for impulse control) does not fully mature until the mid-20s. Consistent, calm responses that acknowledge the emotion while setting the limit are the most effective approach.
By Age
What to expect by age
Hitting and pushing at this age are often experimental rather than aggressive - your toddler is learning about cause and effect and does not understand that their actions cause pain. They may also hit when frustrated because they have no words. Respond briefly and consistently: "I won't let you hit. Hitting hurts. You can hit this pillow." Physical redirection (gently catching their hand) is more effective than verbal explanations at this age. Stay calm - a big reaction can actually reinforce the behavior.
This is the peak age for physical aggression. Your toddler hits, kicks, or pushes because they are frustrated, overwhelmed, overtired, hungry, or want something they cannot have. They may also hit when excited - they literally cannot control the impulse. Get down to their level, hold their hands gently, and say: "I can see you're frustrated. I won't let you hit." Then help them with the problem. Teaching them to stomp feet, squeeze hands, or say "mad!" gives them an alternative outlet.
Aggression should be decreasing as language develops. Your child should be starting to use words ("No!" "Mine!" "Stop!") instead of hitting some of the time. If aggression is increasing, evaluate the environment: Is the child overtired? Overstimulated? Getting enough one-on-one time? Watching aggressive content? Is there a new stressor (new sibling, move, daycare change)? Model calm conflict resolution and praise every instance of using words instead of hitting.
By age 3-4, most children can use words instead of physical aggression most of the time, though they may still hit occasionally when very overwhelmed. If your child is hitting daily, is aggressive toward animals, enjoys hurting others, or cannot be redirected, talk to your pediatrician. Persistent physical aggression beyond age 4 that is not decreasing may benefit from behavioral evaluation and support. Rule out underlying causes like sleep deprivation, sensory processing differences, or anxiety.
What Should You Do?
When to take action
- Your toddler hits when frustrated but can be redirected and calms down
- Hitting decreases as your child develops more language
- Your child shows remorse or concern after hitting (at age 2.5+)
- Aggression is situational (triggered by identifiable causes) rather than constant
- Your child hits, kicks, or bites multiple times daily and the frequency is not decreasing
- Aggression is causing problems at daycare or with other children
- Your child seems to intentionally try to hurt others or shows no concern when they cause pain
- You are struggling to stay calm during aggressive episodes and need support
- Your child is injuring themselves or others seriously during aggressive episodes
- Sudden onset of severe aggression in a previously calm child
- Aggression is accompanied by other concerning behaviors like fire-setting, cruelty to animals, or extreme defiance
Sources
Related Resources
Related Behavior Concerns
Toddler Biting at Daycare - Why and How to Stop It
Biting is one of the most common behavioral issues in toddlers aged 1-3, especially in group settings like daycare. Toddlers bite because they lack the language and impulse control to express big emotions (frustration, excitement, overwhelm, or a need for space). It is not a sign of aggression, bad parenting, or a future behavioral problem. Most children stop biting by age 3-3.5 as their language and emotional regulation skills develop. Consistent, calm responses from all caregivers are the key to reducing biting.
Toddler Having Constant Meltdowns
Tantrums are a normal part of toddler development - most 2-3 year olds have at least one tantrum per day. Meltdowns happen because toddlers feel big emotions (frustration, disappointment, overwhelm) but their prefrontal cortex is far too immature to regulate those emotions. However, when tantrums happen many times per day, last more than 25 minutes, are violent (self-injury, destruction), or persist beyond age 4 without decreasing, it may indicate that your child needs additional support for emotional regulation.
Toddler Destroying and Breaking Things on Purpose
Toddlers are naturally destructive because they are driven by curiosity, cause-and-effect learning, and limited understanding of consequences. Knocking down block towers, throwing food, ripping paper, and taking things apart are developmental activities, not behavioral problems. Your toddler is learning about physics, materials, and their own power. This becomes a concern when destruction is targeted and angry (deliberately destroying valued items during rage), is the primary play pattern with no constructive play, or escalates despite consistent limits.
My Toddler Is Aggressive Toward Pets
Toddlers being rough with pets is extremely common and almost never reflects true aggression or cruelty. Young children lack the motor control to be consistently gentle and do not yet understand that animals feel pain the way they do. With patient, consistent teaching about gentle touch and close supervision, most toddlers learn to interact safely with pets by age 3-4.
My Baby Doesn't Seem Attached to Anyone
By 7-9 months, most babies show clear preferences for their primary caregivers and some wariness of unfamiliar people. If your baby seems equally comfortable with everyone and shows no distress when separated from caregivers, it may simply reflect an easy-going temperament. However, if combined with other social differences, it can occasionally warrant further discussion with your pediatrician.
My Baby Arches Their Back
Back arching is very common in babies and usually a normal way of expressing frustration, discomfort, or just stretching and moving. Most babies arch their backs when upset, tired, or trying to see something. However, persistent arching with crying, especially during feeding, can be a sign of reflux or discomfort that should be discussed with your pediatrician.