Toddler Tantrums: When to Worry? What a Study of 211 Young Children Found

The short answer: loud is normal — the pattern is what matters

Here is the honest version first. A single spectacular tantrum tells you almost nothing. Every parent of a two-year-old has met one, usually in public, usually at maximum volume. This study can't look at one episode and judge it, and it doesn't try.

What it did instead was ask what tantrums look like across 211 ordinary families — what form they take, how long they run, how often they land — and which patterns were the ones weighing on the parents living with them. The unit was never one episode. It was the pattern across weeks. And its most reassuring finding comes first: tantrums themselves are close to universal at this age.

What did the researchers actually do?

Prutipaisan and colleagues surveyed families at a university daycare and kindergarten in Thailand. The main caregivers of 211 children aged 1 to 6 — average age just over 4, and four in five of the questionnaires filled in by mothers — described their child's tantrums over the previous two months: what the child actually did, how long the tantrums usually lasted, how many days a week they happened, and how all of it felt to live with, scored on an 11-question survey the team built for the study.

Two design details matter for how far the results travel. It was a snapshot: everything was reported once, at the same time, by the same caregiver. And the researchers deliberately left out children who already had a diagnosed developmental condition or a significant medical condition — so what follows describes tantrums in typically developing children, and says nothing, one way or the other, about children outside that group.

What does a normal tantrum actually look like?

Mostly, they are noisier and more ordinary than they feel at the time. Of the 211 children, 201 — that's 95% — had shown at least one tantrum behaviour in the previous two months. For most children it was a short menu: about three in ten showed just one kind of behaviour, and only about one in six showed four or more.

The forms were mostly verbal. Nineteen in twenty of the children with tantrums cried, screamed, yelled or argued — crying on its own was the single most common behaviour, at 58%. Stamping came next (43%). Dropping to the floor and other physical-but-harmless displays showed up in about half. And the long, frequent end of the spectrum was rare: only about 1 in 10 children usually tantrumed for more than 15 minutes at a stretch, and about 1 in 7 had tantrums more than 3 times a week.

One more number worth sitting with, because it surprises people: just under half of the children with tantrums — 46% — had shown some physically aggressive behaviour, like hitting out, hurting themselves, or throwing and breaking things, with throwing or destroying objects the most common of those. Aggression inside a tantrum, on its own, is not rare either. Which is exactly why the researchers didn't use any single behaviour as their line.

When to be concerned about toddler tantrums: the three patterns that marked the harder end

Borrowing from earlier research on which tantrums tend to be atypical, the team defined a pattern as "problematic" if it showed any one of three characteristics: the tantrums involved physical aggression; they lasted more than 15 minutes; or they landed on more than 3 days a week. By that definition, 111 of the 201 children who had tantrums — 55%, just over half — were in the problematic group. Only 5 children in the whole study showed all three.

That sounds alarming until you read what the label was actually measuring. The problematic group's parents scored their emotional burden at 23.3 out of 55, against 17.7 for the nonproblematic group — a clear, statistically solid gap (P=0.001). They were more likely to say they felt stressed and worn down, unsure what to do, short on time for themselves, and worried the tantrums would affect their child's future. The flag, in other words, lands on the families carrying the most — which is why the authors' conclusion is that those families should be offered support, not that those children should be labelled.

Two details keep the finding honest. When the researchers separated the three markers, physical aggression and frequent tantrums were each tied to higher parent burden on their own — but long duration, on its own, was not. A stopwatch reading past 15 minutes is part of the pattern to notice, not the scariest single sign. And the problematic group looked no different from the other group in age, in boys versus girls, or in parents' education. There is no "kind of child" this happens to. It's a pattern of weeks, visible in any family.

What this study can't tell you

The markers are not medical cut-offs. "Problematic" is a definition these researchers built from earlier studies, and in their own data it is backed by one thing: it tracked how much parents were struggling, at one point in time. It is not a diagnostic threshold, and no single number in this paper — not 15 minutes, not 3 days a week — means "your child needs a doctor." What the patterns justify is mentioning them at a check-up — a much smaller step.

It can't show what happens next. This was one snapshot, in 2021, of children aged 1 to 6. Nobody followed these children to see whose tantrums faded and whose didn't, so the study cannot tell you that a flagged pattern causes problems later — or that it doesn't. Earlier research the authors cite does describe the usual arc: tantrums typically start around 12 to 18 months, peak at 2 to 3 years, and fade by about 4 or 5. That's the background this study sits in, not a result it produced.

One country, one setting, and possibly a worried sample. These were Thai families at one university's daycare and kindergarten, mostly with college-educated mothers — and what counts as a "big" tantrum is partly cultural, as the authors themselves note. On top of that, COVID closures made questionnaires hard to distribute, and the authors say parents who were already concerned about tantrums may have been more likely to reply, which could push the percentages up.

It says nothing about children with developmental conditions. Those children were excluded on purpose. If your child has a diagnosis — or you're seeking one — this study's percentages simply aren't about them, in either direction.

The parents graded their own homework. The same caregiver reported the tantrums and rated their own burden, on a questionnaire built for this study rather than a standardised one. That doesn't make the gap between the groups imaginary — but it's one more reason to treat the numbers as a map of a pattern, not a measurement of your family.

Frequently Asked Questions

The takeaway

Every parent asking "when to worry?" is really asking to be told where the line is. This study of 211 children suggests the line isn't a volume, a place, or one bad afternoon — it's a pattern: storms that regularly run long, land on most days, or carry aggression in them, in a family that's feeling the weight of it. Most tantrums, even loud ones with an audience, are just the weather of being two or three. And when the pattern does start to flag, the study's own conclusion is the kindest part of it: that's not a verdict on your child. It's a sign your family should be offered some help — and asking for it early is the whole point.