Sibling Fighting and Jealousy: What Actually Helps
Written by the Inclusive Developmental and Therapy Center therapy team — our Speech & Language Therapist, psychology and ABA staff. Clinical reviewer for this site: Dr Muhammad Suffyan, MB BS (GMC 8023727) · Updated August 2026; this page has changed since our last clinical review.
They fight over a chair. Over who got out of the car first. Over a colour of cup that neither of them wanted ten seconds earlier.
Some of this is simply what siblings do, and a house with two children in it is never going to be quiet. But when it is constant, when one child is genuinely frightened of another, or when every attempt to be fair somehow makes things worse, there is usually something specific driving it — and it is rarely the chair. If a new baby is on the way, read preparing a child for a new baby alongside this.
What is usually underneath it
Competition for you
This is the big one and it is worth sitting with. To a child, a parent's attention is a finite resource, and a sibling is the person taking it. That is not a distortion — it is arithmetic, and it is why the fighting so often peaks at the moments you are least available: cooking, on the phone, feeding the baby, at the end of a long day.
It is also why attention given for fighting reliably increases fighting. If the only guaranteed way to get an adult to stop what they are doing and come is to make a noise with your brother, the noise is the rational move.
A new baby
Regression, clinginess, hitting, and asking to be a baby again are the standard response, and none of it is naughtiness. The most useful reframe we can offer parents: your older child has just discovered that your love, which they believed was theirs, is divisible. That is a genuine loss and it deserves acknowledging rather than correcting.
One child needs much more
When one child has a disability, a chronic illness or additional needs, the arithmetic is visible to everyone in the house. The sibling gets less time and knows exactly why — which makes it impossible to be angry about without also feeling guilty. That combination frequently comes out sideways: as fighting, as sudden difficulty at school, or as a child who is conspicuously, exhaustingly good. Our page on supporting brothers and sisters is written for exactly this.
Different needs colliding
A sensory-sensitive child and a loud one share a bedroom. A child with poor impulse control and a child who cannot let anything go. Neither is misbehaving; the mismatch is producing the friction, and no amount of fairness will resolve a genuine incompatibility of environment.
Boredom, hunger, tiredness
Unglamorous and enormous. A great deal of sibling conflict is a timetable problem wearing a disguise — the hour before dinner, the end of the school week, the long afternoon with nothing arranged.
Why refereeing makes it worse
The instinct is to find out who started it and deliver a verdict. It rarely works, for three reasons.
You did not see it, so you will get it wrong regularly, and children keep score of that with terrifying accuracy. It teaches both children that the way to win an argument is to get an adult involved first and loudest — so they escalate towards you rather than settling anything. And it hands out two permanent roles: one child becomes the aggressor and the other the victim, and those roles stick long after the behaviour has changed.
The alternative is not ignoring it. It is changing what you respond to.
What to do instead
- Stop the behaviour, skip the trial. "I'm not finding out who started it. The game stops for ten minutes." Both children, same outcome. It is less satisfying and far more effective.
- Separate hurting from arguing, absolutely. Arguing is normal and children need practice at it. Hitting, and anything frightening, is a different category with an immediate response and no negotiation. Make that line explicit and never blur it.
- Give attention to the peace. This is the step everyone skips. Notice them playing well, out loud, while it is happening — "you two have been building that for twenty minutes." If attention only ever arrives with conflict, conflict is what gets produced.
- Ten minutes each, alone, regularly. Not a day out. Ten minutes with one child and no phone, doing what they chose. It is the single most effective intervention we suggest for sibling conflict, and the one families are most sceptical about until they try it.
- Stop aiming for identical. Fairness is not sameness. "You are both getting what you need, and those are different things" is a sentence children accept far more readily than adults expect — provided it is actually true.
- Give each child something that is not shared. One toy, one shelf, one corner that nobody else may touch. A child who owns nothing outright defends everything.
- Teach the repair, not just the apology. A forced sorry teaches the word. Ask instead: what would make it better? Children produce surprisingly good answers, and it is a skill that outlasts childhood.
The new-baby version
- Let the older child be older on purpose — a job, a privilege, a later bedtime. Something that is theirs because they are bigger.
- Do not attribute your refusals to the baby. "I can't, I'm feeding the baby" thirty times a day builds a case against the baby. "I'll come when I've finished" says the same thing without the villain.
- Never leave a toddler alone with a baby, however gentle they have been. That is not distrust; it is that a two-year-old cannot judge force.
- Expect regression and do not punish it. Wanting a bottle again passes much faster when it is met calmly than when it is treated as a battle.
When it is more than rivalry
Ordinary sibling conflict is loud, roughly reciprocal, and it ends. Take it more seriously when:
- One child is genuinely afraid of the other, or avoids being alone with them
- It is entirely one-directional, and has been for months
- There is real injury, or anything sexual
- One child is being systematically humiliated rather than fought with
- The child on the receiving end has become withdrawn, anxious, or is not sleeping
That is not rivalry, and it does not resolve on its own. It needs adult intervention and usually outside help.
Also worth looking further if one child's aggression is severe, is not only aimed at siblings, and has not shifted with anything you have tried. Our pages on emotional dysregulation and oppositional defiant disorder cover what else it can be, and our ABC behaviour record is the quickest way to find out what actually triggers it — which, in a house with siblings, is almost never what everyone assumes.
Where we fit
Most families who come to us about this do not need family therapy. They need to find out what the fighting is actually for — attention, escape, a sensory mismatch, or a genuine timetable problem — and then change two or three things at the points where it reliably happens.
Where one child has additional needs we also work with the sibling, who is frequently carrying more than anyone has noticed and is very rarely asked how they are.
A consultation is Rs 1,500 and lasts up to 50 minutes, we work in Urdu or English, and you do not need a referral.
And if you are the one running on empty holding all of it together, see the break you are not taking.
Where the fighting started when the household changed shape, see when parents separate.
Frequently asked questions
Why do my children fight constantly?
Most often over you. To a child a parent’s attention is a finite resource and a sibling is the person taking it, which is why fighting peaks exactly when you are least available — cooking, on the phone, feeding the baby, at the end of a long day. It is also why attention given for fighting reliably increases fighting: if the guaranteed way to make an adult stop and come is to make a noise with your brother, the noise is the rational move.
Should I work out who started it?
Usually not. You did not see it, so you will get it wrong regularly and children keep score of that with great accuracy. It teaches both children that the way to win is to get an adult involved first and loudest. And it hands out two permanent roles — aggressor and victim — that stick long after the behaviour has changed. Stop the behaviour and skip the trial: "I am not finding out who started it, the game stops for ten minutes."
What actually reduces the fighting?
Separate hurting from arguing absolutely — arguing is normal and children need practice at it, while hitting has an immediate response and no negotiation. Give attention to the peace, out loud, while it is happening. Ten minutes alone with each child regularly, no phone, doing what they chose — the single most effective thing we suggest and the one families are most sceptical about. And give each child something that is not shared, because a child who owns nothing outright defends everything.
How do I make things fair between them?
Stop aiming for identical. Fairness is not sameness, and "you are both getting what you need, and those are different things" is a sentence children accept far more readily than adults expect — provided it is actually true.
My older child has started hitting since the baby arrived. Is that normal?
Yes, along with regression, clinginess and asking to be a baby again — and none of it is naughtiness. Your older child has discovered that your love, which they believed was theirs, is divisible; that is a real loss and it deserves acknowledging rather than correcting. Avoid attributing your refusals to the baby, let the older child be older on purpose with a job or a privilege, and never leave a toddler alone with a baby however gentle they have been.
One of my children has additional needs and the other resents it. What do I do?
The arithmetic is visible to everyone in the house — the sibling gets less time and knows exactly why, which makes it impossible to be angry about without also feeling guilty. That combination comes out sideways as fighting, as sudden difficulty at school, or as a child who is conspicuously and exhaustingly good. Those siblings are very rarely asked how they are, and it is worth asking.
When is it more than normal rivalry?
Ordinary conflict is loud, roughly reciprocal, and it ends. Take it seriously when one child is genuinely afraid of the other or avoids being alone with them, when it is entirely one-directional and has been for months, when there is real injury or anything sexual, when one child is being systematically humiliated rather than fought with, or when the child on the receiving end has become withdrawn, anxious or is not sleeping. That does not resolve on its own.
Does forcing them to say sorry help?
It teaches the word rather than the repair. Ask instead what would make it better — children produce surprisingly good answers, and it is a skill that outlasts childhood.