Why siblings quarrel and what actually helps
Conflicts between siblings: causes and what actually helps
TL;DR
Sibling conflicts are completely normal and can even be educational. Small children quarrel several times an hour. The most important thing you can do is teach children to resolve disagreements themselves — rather than always judging who is right.
Few things test parents' patience as much as the constant quarrels between siblings. It starts over a toy car and ends in tears, and often you don't even know who started it. Many parents feel they spend a disproportionate part of the day acting as judges in cases they can't figure out.
The good news is that sibling conflicts are completely normal — and they contain important learning. The bad news is that our instinctive reaction to step in and settle the matter often worsens the pattern. This guide looks at why siblings quarrel and what actually helps.
How normal is it?
Studies have observed that young siblings can have a conflict as often as every three to ten minutes. This is not a sign that something is wrong — it is part of growing up closely together.
Research on sibling relationships, including that referenced by the National Library of Medicine, shows that conflicts between younger siblings occur surprisingly frequently — several times an hour in the earliest years. This is because siblings share resources, attention, and territory around the clock, while their self-control skills are still developing.
It is worth remembering that siblings are also the place where children practice negotiating, sharing, and reconciling — in a relationship safe enough to handle it. Conflict and closeness go hand in hand.
What triggers the conflicts?
Most sibling quarrels are about resources, attention, or territory — and are amplified when the children are tired or hungry.
Typical triggers are the fight over things (toys, the best spot), over parents' attention (perceived unfairness), and over boundaries ("he came into my room"). Added to this are the classic amplifiers: hunger, tiredness, and boredom, which lower everyone's threshold. A child who has just come home from a long day simply has less energy to share.
Knowing the patterns makes it easier to prevent. A snack at the right time or an activity that gives each child some alone time can remove many conflicts before they arise.
What you should preferably avoid
Some well-meaning reactions actually make conflicts worse:
- Being the judge every time: It teaches children to call you in instead of solving it themselves.
- Demanding it to be "fair": Equality is not always fair — children have different needs.
- Pointing out a culprit: It creates roles like "troublemaker" and "victim" that become fixed.
- Comparing: "Why can't you be nice like your sister?" increases rivalry.
Conflict mediation that works
Instead of judging, you can act as a mediator: acknowledge both perspectives, help the children put their feelings into words, and let them find a solution themselves. This builds lasting skills.
When you need to step in, do so as a mediator rather than a judge. Describe the situation neutrally ("You both want the car"), acknowledge both feelings, and return the problem: "What can we do so that it works for both of you?" For younger children, you need to guide more, but the goal is that they gradually learn to negotiate themselves.
This approach takes a little more time in the moment, but it teaches children conflict management, empathy, and compromise — skills they will need for the rest of their lives. Find more ideas for cooperation between siblings on our inspiration blog.
When it is more than a normal fight
Common quarrels are harmless, but sometimes it escalates into something resembling bullying: when one party consistently dominates, humiliates, or harms the other, and it is not mutual. Here you should intervene clearly and protect the vulnerable child.
Persistent, one-sided aggression may require more attention, and it might be worth talking to a health visitor, PPR, or your own doctor. The Danish Health Authority has materials on children's well-being that can be a good starting point. But remember: most sibling conflicts are completely normal and resolve on their own.
Prevent with shared positive experiences
Siblings who have good shared experiences fight less. Activities where they cooperate toward a common goal strengthen the bond.
Conflicts matter less when the relationship also includes joy. Create situations where siblings cooperate rather than compete — building something together, cooking together, or solving a task as a team. Cooking together is a good example: when two children prepare a meal for the family together, they practice cooperation and experience pride together. It is prevention that is also cozy.
Sibling conflicts are not a sign that you are doing something wrong — they are a normal part of growing up together and an important arena for learning to resolve disagreements. Shift the role from judge to mediator, prevent with food, rest, and shared experiences, and intervene when it tips into something one-sided.
If you want more concrete tools for everyday life with multiple children, check out our inspiration blog, where we gather ideas for cooperation and family togetherness.
Frequently Asked Questions
Is it normal for siblings to fight a lot?
Yes, a lot. Studies have observed conflicts several times an hour among young siblings. It is a normal part of sharing everyday life, resources, and attention.
Should I always intervene in sibling quarrels?
No. Judging every time teaches children to call you instead of solving it themselves. Step in as a mediator when needed, and otherwise let them practice finding solutions.
What typically triggers sibling conflicts?
Usually the fight is over things, attention, or territory — intensified by hunger, tiredness, and boredom. Preventing these removes many conflicts in advance.
When is it bullying rather than ordinary fighting?
When one party consistently dominates, humiliates, or harms the other without reciprocity. Here you should intervene clearly and seek help if necessary.
How do I get siblings to fight less?
Prevent with food, rest, and personal space, avoid comparing them, and create shared positive experiences where they cooperate rather than compete.