Sibling Rivalry: Why Kids Fight and What Parents Can Do

The children are fighting again.

One says:

"She always gets everything."

The other says:

"He started it."

A toy disappears.

Someone shouts.

Someone runs to you.

And you are asked to decide who is right.

This is family life in many homes.

Sibling rivalry can include arguments, competition, jealousy, complaints about fairness, fights over belongings, and attempts to get more parent attention.

Some of this is normal.

Children are learning how to:

• Share space
• Wait
• Negotiate
• Handle disappointment
• Protect their belongings
• Express anger
• See another person's point of view

Siblings give each other many chances to practise these skills.

But normal disagreement has limits.

Repeated hitting, intimidation, cruelty, fear, or one child controlling another should not be dismissed as ordinary rivalry.

As a father of four, including three sons who grew up close in age, and now a grandfather of four, I have lived through plenty of arguments about toys, fairness, space, turns, and who got more attention.

I learned that the goal is not to create children who never disagree.

The goal is to help them disagree more safely and respectfully.

This guide explains why siblings fight, sibling jealousy, competition, fairness, new baby adjustment, sharing, individual attention, conflict resolution, harmful aggression, and what parents can do when brothers and sisters cannot get along.

What Is Sibling Rivalry?

Sibling rivalry means competition or conflict between siblings.

It can look like:

• Arguing
• Complaining
• Jealousy
• Tattling
• Competition
• Fighting over toys
• Fighting over parent attention
• Complaints about fairness
• Wanting more privacy
• Resenting another child's privileges

Nemours KidsHealth notes that it is common for brothers and sisters to fight.

The reasons change as children grow.

A toddler may fight because another child touched a favourite toy.

A school-age child may focus heavily on fairness.

A teenager may become angry when a sibling enters their room or uses personal belongings.

Is sibling rivalry normal?

Some sibling conflict is normal.

Children who live together will not agree all the time.

They may want the same thing.

They may have different personalities.

They may become tired of sharing space.

They may be at very different developmental stages.

Some minor disagreements can even give children practice with:

• Negotiation
• Compromise
• Listening
• Taking turns
• Managing frustration
• Repairing relationships

But normal does not mean parents should ignore every form of sibling behaviour.

Normal Sibling Conflict Versus Harmful Aggression

Often Normal Conflict	Needs Stronger Adult Action
Arguing about whose turn it is	Repeated hitting or kicking
Complaining about fairness	Threatening serious harm
Getting angry over a toy	One child regularly frightening another
Wanting time away from a sibling	Destroying belongings to intimidate
Occasional name-calling that is corrected	Ongoing humiliation or cruel targeting
Both children can leave the disagreement	One child cannot safely escape or protect themselves

Research on sibling aggression shows that chronic harmful behaviour between siblings can have real emotional effects.

Do not excuse repeated harm with:

"They are siblings."

Or:

"That is just rivalry."

Why Do Siblings Fight?

There is rarely one cause.

Several things can happen together.

1. They Want Parent Attention

Children need connection.

A child may notice:

"Mom is helping my brother."

"Dad went to my sister's game."

"The baby is always being held."

Then conflict starts.

Sometimes a child discovers that starting a fight brings the parent into the room immediately.

Even negative attention is still attention.

2. Sibling Jealousy

Sibling jealousy can appear when one child thinks another is receiving more:

• Love
• Attention
• Praise
• Freedom
• Gifts
• Help

The child does not need to be correct for the feeling to be real.

Instead of saying:

"That is ridiculous. I treat you exactly the same."

Try:

"It feels unfair to you."

Then explain what is happening.

For a deeper guide to jealousy itself, read Sibling Jealousy.

3. Children Are at Different Ages

A four-year-old and a ten-year-old do not have the same needs.

The older child may:

• Stay awake later
• Have more privacy
• Go places without the younger child
• Receive more responsibility

The younger child may think:

"That is unfair."

The older child may think:

"Why do I always have to understand because I am older?"

Both feelings can create conflict.

4. Temperament Differences

Children are different.

One may love noise.

Another may need quiet.

One may want to play together all day.

Another may need time alone.

One may forget a disagreement quickly.

Another may stay upset longer.

Different temperaments can create friction without either child being wrong.

5. They Want the Same Thing

Two children.

One toy.

One screen.

One seat.

One parent.

Conflict is easy to understand.

Young children especially have limited ability to wait.

6. They Care About Fairness

School-age children often become very sensitive to fairness.

You may hear:

"She got more."

"He had longer."

"You always choose him."

Parents can help children understand that fair does not always mean identical.

Fair Does Not Always Mean the Same

Children have different:

• Ages
• Needs
• Responsibilities
• Health needs
• Abilities
• Schedules

A younger child may need more help getting dressed.

An older child may get a later bedtime.

A child with a medical condition may need more appointments.

That does not mean one child is loved more.

Explain differences when children are old enough to understand.

You can say:

"You both matter the same. You do not always need the same thing."

7. Comparisons Create Competition

Comparisons can turn siblings into opponents.

Avoid:

"Why can't you be more like your brother?"

"Your sister never gives me this problem."

"He is the smart one."

"She is the athletic one."

Even positive labels can create pressure.

If one child becomes:

"the responsible one"

another may begin to feel like:

"the difficult one."

Describe behaviour instead.

Say:

"You worked hard on that."

Not:

"You are the smart child in this family."

8. Stress Makes Conflict Worse

Children may fight more when family life changes.

This can happen during:

• A move
• School changes
• Divorce
• Illness
• Financial stress
• A parent's work change
• A new baby
• Grief

When children have less emotional capacity, small frustrations can become large fights.

9. They Copy What They See

Children watch adults.

If disagreements at home include:

• Yelling
• Insults
• Threats
• Door slamming
• Physical aggression

Children may begin using the same tools.

Parents do not need to hide every disagreement.

Children can benefit from seeing adults disagree respectfully.

For example:

"I disagree with you."

"I need a minute to calm down."

"Let's find a solution."

Does Birth Order Cause Sibling Rivalry?

Birth order can affect family experience.

A first child may feel displaced when another baby arrives.

A younger child may want privileges an older sibling has.

But birth order does not decide a child's personality or guarantee rivalry.

Avoid labels such as:

"Middle children are always jealous."

Or:

"The youngest always gets spoiled."

Look at your actual children instead.

Sibling Rivalry After a New Baby

A new sibling changes family life.

The older child sees the baby being:

• Held
• Fed
• Comforted
• Changed
• Talked about

The older child may feel:

"Where is my place now?"

This can lead to new baby jealousy.

What New Baby Jealousy Can Look Like

You may notice:

• More clinginess
• More tantrums
• Wanting to be carried
• Wanting an old bottle or baby habit
• Potty accidents
• Anger toward the baby
• Demanding attention during feeds
• Wanting the baby's toys

These behaviours can be part of adjustment.

Do not shame the older child for having mixed feelings.

How to Help an Older Child Adjust to a New Baby

Try to:

• Keep familiar routines when possible
• Give the older child individual attention
• Let them help in safe ways
• Allow mixed feelings
• Keep safety rules clear
• Avoid forcing affection toward the baby

Do not make every denial sound like the baby's fault.

Instead of:

"I cannot play because I have to feed the baby."

Try:

"I can play after this feed."

For the complete transition plan, read New Baby and Toddler.

Should You Force a Child to Love the New Baby?

No.

You cannot force a relationship.

A child may love the baby and still feel jealous.

They may want the baby near them one minute and far away the next.

Keep interactions safe.

Let closeness grow naturally.

What Should Parents Do When Siblings Fight?

The first question is simple.

Is anyone unsafe?

If yes, step in immediately.

If no, decide whether the children can try to solve the small problem themselves.

Step 1: Stop Unsafe Behaviour

If there is hitting, kicking, biting, choking, throwing hard objects, or another physical danger, separate the children.

Say:

"I will not let you hurt each other."

Keep it short.

Safety comes before a long lesson.

For physical behaviour in younger children, read Toddler Hitting.

Step 2: Let Everyone Calm Down

Do not force a peace meeting while both children are still furious.

Give them space.

Wait until voices and bodies are calmer.

Then talk.

Step 3: Hear the Problem

You do not need a courtroom.

You can ask:

"What happened?"

Then let each child speak.

Older children can be encouraged to describe the problem without insults.

Step 4: Name the Need

Maybe both children want the same toy.

Maybe one wants privacy.

Maybe one thinks the rule is unfair.

Maybe someone was embarrassed.

A clear problem is easier to solve.

Step 5: Ask for Ideas

Try:

"What could we do?"

Possible solutions might include:

• Taking turns
• Using a timer
• Choosing another activity
• Playing separately
• Returning a borrowed item
• Giving personal space

This is basic conflict resolution for siblings.

Step 6: Help Them Choose a Solution

The solution should be safe and reasonable.

Young children may need more help.

Older children can take more responsibility.

Should Parents Stay Out of Sibling Fights?

Sometimes.

Nemours and AAP guidance both support allowing children to work through some minor disagreements rather than parents solving every problem.

If you always rescue them, children may learn:

"I do not need to solve this. I just need to call Mom."

But staying out does not mean ignoring danger.

When Can You Let Children Try to Solve It?

You may wait when:

• The conflict is verbal
• No one is afraid
• No one is being physically harmed
• The children have similar power in the situation
• They have some ability to communicate
• The disagreement is ordinary

Stay nearby if needed.

You can coach without choosing a winner.

When Should You Step In?

Step in when:

• Someone is being hit
• Someone is being kicked
• There is choking
• Objects are being used as weapons
• There are serious threats
• One child is frightened
• One child is much younger or less able to protect themselves
• The same child is repeatedly targeted
• Property is being destroyed to intimidate someone

Safety is not favouritism.

Should Parents Always Stay Neutral?

No.

Neutrality can be useful when you did not see what happened during a minor argument.

Do not pretend to know who started something when you do not.

But if you clearly saw one child hurt another, you do not need to act as though both behaviours were equal.

You can say:

"You were angry. Hitting was not safe."

Protecting the harmed child is not taking an unfair side.

Do Not Punish Both Children Automatically

Parents sometimes say:

"I do not care who started it. You are both punished."

That may feel fast.

But it can be unfair when one child was clearly being harmed.

Focus on the behaviour each child actually controlled.

Set Simple Family Rules

Children need to know the limits before the next fight.

Rules might include:

• No hitting
• No kicking
• No threatening
• Ask before taking personal belongings
• Knock before entering private rooms when age-appropriate
• Ask an adult for help when someone is unsafe

Keep the list short.

Use language children can remember.

Respect Personal Belongings

Siblings do not need to share every item they own.

Some toys may belong to the family.

Other things can be personal.

Before a play session or visit, a younger child can put a few very special toys away.

This can prevent unnecessary fights.

For younger children learning this skill, read Teaching Toddlers to Share.

Sharing Is Not the Same as Losing Ownership

A child may be more willing to take turns when they trust that their item will come back.

Instead of:

"Give it to your brother. You have to share."

Try:

"You are using it now. He can have a turn when you are finished."

For shared family toys, a timer can help younger children understand turns.

Give Each Child Individual Attention

Children do not need a huge special outing every day.

Individual attention for siblings can happen in ordinary moments.

For example:

• Talking at bedtime
• Walking the dog together
• Reading a book
• Cooking together
• Talking in the car

AAP HealthyChildren recommends creating individual time with each child.

This helps children know they can have your attention without competing for it.

Do You Need Exactly 10 or 15 Minutes?

No.

There is no magic number.

A few focused minutes can matter.

Longer time can be lovely when your schedule allows.

Quality matters more than turning connection into a stopwatch rule.

Avoid Making Children Compete for Praise

Instead of:

"Who can clean fastest?"

try:

"Let's get the room ready together."

Competition can be fun in games.

But not every family task needs a winner.

Praise Cooperation When You See It

Notice useful behaviour.

Say:

"You waited for your turn."

"You asked before taking the marker."

"You two solved that without hitting."

Specific praise tells children what worked.

Do Not Force Siblings to Be Best Friends

Siblings can have a healthy relationship without:

• Playing together constantly
• Sharing every hobby
• Having the same friends
• Wanting the same activities

Respect can be a better goal than forced closeness.

Give Children Time Apart

Too much togetherness can create conflict.

Children sometimes need:

• Separate play
• Different friends
• Personal hobbies
• Quiet time
• Age-appropriate privacy

Time apart does not mean the sibling relationship is failing.

Encourage Teamwork Without Creating Forced Bonding

Shared activities can help children have positive experiences together.

Ideas include:

• Building something
• Cooking
• A family puzzle
• A treasure hunt
• Watering plants
• Planning a family game

Choose activities that fit both ages.

Do not force a teenager to entertain a toddler for hours and call it bonding.

Should Older Children Always Help With Younger Siblings?

No.

An older sibling can have age-appropriate family responsibilities.

But they should not automatically become a second parent.

Be especially careful about repeatedly asking the older child to:

• Babysit
• Give up activities
• Manage younger sibling behaviour
• Take responsibility for the younger child's emotions

This can create resentment.

What If One Child Has Special Needs?

A child with a disability, illness, developmental condition, or emotional need may require more parent time.

Siblings may notice this.

Explain honestly at an age-appropriate level.

You can say:

"Your brother needs more help with this task. You need help with different things."

Remember:

Fair does not always mean equal.

Sibling Rivalry in Blended Families

Step siblings may face additional changes.

They may be adjusting to:

• A new home
• New adults
• Different family rules
• Sharing space
• Loyalty feelings
• New siblings

Do not expect instant closeness.

For focused guidance, read Step Sibling Issues.

Sibling Rivalry by Age

Toddlers and Preschoolers

Young children have limited:

• Impulse control
• Patience
• Language
• Ability to understand another viewpoint

Expect more adult support.

Use simple rules.

Use turn-taking.

Stop physical aggression immediately.

School Age Children

Children can begin using stronger problem-solving skills.

Help them practise:

• Listening
• Taking turns
• Compromise
• Respecting belongings
• Using words instead of physical behaviour

For broader social development at this age, read Kids and Friendships.

Tweens and Teens

Conflict may become less about toys and more about:

• Privacy
• Friends
• Clothing
• Technology
• Responsibilities
• Different privileges

Respect personal space.

Do not force older siblings to include each other in every friendship or activity.

What About Tattling?

Young children often tell adults about sibling behaviour.

Teach the difference between:

Getting help for safety

and:

Trying to get someone in trouble over a small issue.

If someone is hurt, afraid, threatened, or unsafe, children should tell an adult.

Never discourage safety reporting.

Should Children Be Forced to Apologize?

A quick:

"Say sorry."

does not always teach repair.

When everyone is calm, help the child understand what needs fixing.

Repair might mean:

• Returning an item
• Helping rebuild something
• Checking whether the other child is okay
• Replacing something damaged
• Giving space
• Saying a genuine apology

Simple Sibling Conflict Scripts

When Two Children Want the Same Toy

"You both want it."

"We need a plan."

"Who has the first turn?"

When One Child Is Angry

"You can be angry."

"You cannot hit."

When One Child Feels Things Are Unfair

"You think she got more."

"Let's look at what each of you needs."

When Children Keep Arguing

"You are not solving this right now."

"Take some space, and we will try again when everyone is calm."

When a Child Wants Privacy

"You can ask for space."

"Your sibling needs to respect that."

What Parents Should Avoid

Do Not Compare Children

Comparisons increase competition.

Do Not Shame Jealousy

Jealousy is a feeling.

Help children manage what they do with it.

Do Not Force Constant Sharing

Children can have personal possessions.

Do Not Make the Older Child Responsible for Everything

Being older does not mean always giving in.

Do Not Ignore Repeated Harm

Serious aggression needs adult action.

Do Not Demand Instant Friendship

Respect can grow before closeness.

Do Not Keep Score of Love

A parent's relationship with each child can be different without being less loving.

Sibling Rivalry Myths

Myth: Good Siblings Never Fight

Fact: Even close siblings disagree.

Myth: Parents Must Solve Every Fight

Fact: Children can learn from some safe disagreements.

Myth: Never Take Sides

Fact: Parents should protect children when one is being harmed.

Myth: Fair Means Identical

Fact: Children of different ages and needs may require different things.

Myth: Siblings Must Share Everything

Fact: Personal belongings and privacy can reduce conflict.

Myth: A New Baby Should Make an Older Child Happy

Fact: Children can feel love, curiosity, anger, and jealousy at the same time.

Myth: Rivalry Can Be Eliminated Forever

Fact: The realistic goal is safer conflict and a stronger relationship, not zero disagreement.

When Sibling Rivalry Becomes Sibling Aggression

This distinction matters.

Some families normalize behaviour that deserves more attention.

Sibling aggression can include:

• Hitting
• Kicking
• Choking
• Threats
• Destroying belongings
• Severe intimidation
• Ongoing humiliation

Repeated aggression can affect emotional well-being.

If one child is afraid of the other, take that seriously.

For broader aggression concerns, see Aggressive Behaviour in Kids.

When Should Parents Seek Professional Help?

Consider talking with a pediatrician, school counsellor, family therapist, or qualified child mental health professional when:

• One child is regularly afraid of another
• Someone is being injured
• Threats are becoming serious
• Fighting is disrupting daily family life
• One child is repeatedly targeted
• A child seems anxious, depressed, or withdrawn
• Parents cannot keep the children safe
• Conflict remains severe despite consistent limits
• The family feels overwhelmed

Get urgent help if there is immediate danger of serious injury.

A 7 Day Sibling Rivalry Reset

Day 1

Choose three family safety rules.

Day 2

Notice whether you compare the children.

Stop one comparison.

Day 3

Give each child some individual attention.

Day 4

Identify the most common fight.

Is it a toy?

Privacy?

Attention?

A screen?

Day 5

Create one simple plan for that repeated conflict.

For example:

A turn schedule.

A private toy box.

A screen rotation.

Day 6

Notice one moment of cooperation.

Name it.

Day 7

Have a short familycheck-inn.

Ask:

"What helped this week?"

"What is still hard?"

Sibling Rivalry Checklist for Parents

• Expect some disagreement
• Do not promise zero fighting
• Stop physical aggression immediately
• Allow safe minor conflicts to be worked out
• Avoid comparisons
• Avoid fixed sibling labels
• Give individual attention
• Explain why fair does not always mean identical
• Respect personal belongings
• Respect age-appropriate privacy
• Teach turn-taking
• Teach problem solving
• Praise cooperation
• Let siblings have separate interests
• Do not force closeness
• Keep older siblings from becoming substitute parents
• Take fear and intimidation seriously
• Seek professional help when conflict becomes unsafe

Conclusion

Sibling rivalry is not a sign that your children will never be close.

Some arguing is part of growing up together.

Your job is not to referee every disagreement.

Your job is to create safe limits.

Avoid comparisons.

Protect each child's place in the family.

Give individual attention.

Teach children how to solve ordinary conflict.

And step in firmly when rivalry becomes aggression or fear.

Your next step: Choose the sibling conflict that happens most often in your home. Decide whether the real problem is attention, fairness, belongings, privacy, or safety. Then create one simple family rule for that problem today.

High Authority References and Sources

1. American Academy of Pediatrics HealthyChildren: Sibling Relationships and Healthy Bonds
2. American Academy of Pediatrics HealthyChildren: Preparing an Older Child for a New Baby
3. Nemours KidsHealth: Sibling Rivalry
4. Cleveland Clinic: Sibling Rivalry Causes and Parent Strategies
5. PubMed Central: Sibling Aggression and Abuse as Public Health Concerns

More Parnthub Sibling and Child Behaviour Guides

• Sibling Jealousy
• Step Sibling Issues
• New Baby and Toddler
• Toddler Hitting
• Teaching Toddlers to Share
• Aggressive Behaviour in Kids
• Kids and Friendships

Big Kids Hub: Explore friendship behaviour, confidence, development, school life, family relationships, health, and safety in our Complete Big Kids Guide.

Toddler Hub: For younger siblings, behaviour, sharing, hitting, development, emotions, and new sibling adjustment in our Complete Toddler Guide.

Child Health and Safety Hub: Behaviour, emotional wellbeing, safety, illness, and when professional help may be needed in our Child Health and Safety Guide.

Parenting Styles Hub: Explore communication, discipline, boundaries, warmth, structure, and different parenting approaches in our Parenting Styles Guide.

About the Author

Adel Galal
Founder of Parnthub
Father of four, three sons and one daughter
Grandfather of four
More than three decades of parenting and grandparenting experience

I created Parnthub to make parenting guidance easier to understand and use.

Sibling relationships are one topic that is especially personal to me.

I raised three sons close in age as well as a daughter.

That meant years of sharing rooms, competing for attention, arguing over belongings, learning fairness, and slowly learning how to solve disagreements.

I also studied books that changed how I thought about family conflict, including Siblings Without Rivalry by Adele Faber and Elaine Mazlish.

What I learned from both parenting and research is that children do not need parents to erase every disagreement.

They need us to keep them safe.

They need fair boundaries.

They need individual connection.

And they need repeated chances to practise better ways of handling conflict.

For child behaviour topics, I compare my family experience with current pediatric, child development, mental health, and behavioural guidance.

I do not present personal experience as professional diagnosis.

I am not a dermatologist or A doctor, and this content does not replace professional medical advice. What I share comes from real-life experience, extensive research, and consultation with healthcare providers. Always consult qualified medical professionals for diagnosis and treatment of any health condition.

Learn more about Adel Galal and Parnthub.

Frequently Asked Questions About Sibling Rivalry

What is sibling rivalry?

Sibling rivalry is conflict, jealousy, or competition between brothers, sisters, or other siblings. It can involve attention, toys, privacy, fairness, privileges, and differences in age or personality.

Is sibling rivalry normal?

Some sibling disagreement is normal. Children living together need to learn sharing, negotiation, boundaries, and conflict skills. Repeated aggression, intimidation, fear, or injury should not be dismissed as normal rivalry.

Why do siblings fight so much?

Siblings may fight over parent attention, belongings, fairness, privacy, different privileges, personality differences, developmental stages, tiredness, stress, or jealousy.

What is the root cause of sibling rivalry?

There is no single root cause. Competition and jealousy can contribute, but age differences, temperament, family changes, attention needs, boundaries, privacy, and stress can also play a role.

At what age is sibling rivalry worst?

There is no single age when sibling rivalry is always worst. Conflict changes with development. Young children may fight over toys and turns, while older children may fight over fairness, privacy, technology, responsibilities, and freedom.

How do I stop my children from fighting?

You probably cannot stop every disagreement. Set safety rules, avoid comparisons, protect personal belongings, give individual attention, teach conflict skills, and let children solve minor safe disagreements when they can.

Should parents intervene every time siblings fight?

No. Children can learn from some safe minor disagreements. Step in when there is physical harm, intimidation, a serious threat, a large power imbalance, or one child is afraid.

Should parents stay neutral during sibling fights?

Neutrality can help when you did not see what happened during a minor dispute. But parents should not remain neutral when one child is clearly hurting or intimidating another.

Should both children receive the same punishment?

Not automatically. Respond to the behaviour eachh chieachually controlled. Equal punishment can be unfair when one child was clearly harmed or had little ability to protect themselves.

How can I reduce sibling jealousy?

Avoid comparisons, give each child individual attention, explain differences in rules or privileges, notice each child's strengths, and let children express jealous feelings without shame.

Does a new baby cause sibling rivalry?

A new baby can trigger jealousy because the older child experiences a large change in parent attention and family routine. Clinginess, regression, anger, and wanting more attention can occur during adjustment.

How can I help a toddler who is jealous of a new baby?

Keep familiar routines when possible, give the toddler individual attention, include them in simple baby care tasks, allow mixed feelings, and supervise interactions closely.

Should siblings have to share everything?

No. Children can learn turn-taking while still having personal belongings that other siblings must ask to use.

Is it okay for siblings to have separate activities?

Yes. Separate interests, friends, and quiet time can reduce conflict and help each child develop their own identity.

Should older siblings always give in to younger siblings?

No. Older children may have more skills, but they should not be expected to surrender every toy, choice, or boundary simply because they are older.

No. Ordinary rivalry involves disagreement and competition. Repeated hitting, intimidation, serious threats, deliberate destruction, or one sibling making another afraid should be treated as a safety concern.

When should I worry about siblings fighting?

Seek professional help when one child is repeatedly afraid, someone is being injured, threats are serious, aggression is persistent, a child becomes anxious or withdrawn, or conflict is disrupting normal family life.

Can sibling conflict teach useful skills?

Yes. Safe disagreements can give children practice with negotiation, compromise, listening, taking turns, seeing another person's point of view, and repairing relationships.

Can siblings become close after years of rivalry?

Yes. Childhood conflict does not automatically predict the adult relationship. Family patterns, maturity, life changes, communication, and individual personalities can all change sibling relationships over time.