"He Can't Sit Still"

By Laura Lurns · Reviewed by Philip Weaver · Last reviewed 2026-10-07

What not sitting still cannot tell you

A child who cannot sit still is showing you a behavior. The behavior alone does not tell you why.

Nothing on this page rules anything in or out, and we are not able to.

We hold no study of fidgeting itself.

Our rule is to describe patterns on these pages. We do not put a name on a child.

Movement breaks

Movement breaks help children come back to a task. That is worth building into the day for what it does for the child.

Build the break in before your child stalls. In our view, breaks are worth trying before pushing a child through unbroken effort.

Watson and colleagues (2017) reviewed classroom studies of active breaks in elementary schools. The breaks went with more on-task and less off-task behavior in class. The studies varied widely. We could read only the review's summary.

Maykel and colleagues (2018) studied one class of 23 third graders. The children took 10-minute breaks of whole-body movement. Their time on task improved for the 45 minutes the study watched. The class was compared with itself, with and without the breaks. We could read only the study's summary.

The review and the class study were both in ordinary classrooms. The children were not picked for attention or learning trouble. The studies did not test other kinds of break.

What the break studies leave open

Movement is worth building into the day for what it does for the child. On attention itself, the studies we hold do not settle it.

We hold no study of standing desks or therapy balls.

Sleep is worth checking

Sleep is worth checking too. Loud snoring, or pauses in breathing at night, are a question for your child's doctor.

Fallone and colleagues (2001) cut children's sleep short for one night. It was a lab study of 82 children. After the short night, the children showed more sleepy and inattentive behavior. The short night was not linked to more overactive or impulsive behavior. It was one night, and the study looked only at short-term effects. We could read only the study's summary.

If you are wondering about ADHD

We cannot tell you whether your child has ADHD.

The Centers for Disease Control and Prevention (CDC) is a US government health agency. As of 2026, the CDC says a mental-health professional can diagnose ADHD. So can a child's regular doctor, such as a pediatrician, the CDC says.

Layton and colleagues (2018) looked at ADHD diagnoses in a large group of US children. The youngest in each school year were diagnosed more often than the oldest, the study found. The study used insurance records. The authors thought being young for the year might be read as ADHD. The study did not show that in any one child.

In our reading, why the pattern happens is not settled. In our view, raise this with the school and with your child's doctor.

Our position is to put support in place now, not to wait and see. No study we have tests wait-and-see as a plan for a learning difficulty. So we would not tell you to wait.

If your child has lost a skill

Some children could do something and now cannot. That is different from a child who has not built the skill yet. Our position is that a lost skill goes to a doctor first, not a tutor.

When to ask for help

Each of these is a reason to ask for help on its own.

• Little change, even with steady practice and good teaching.
• Schoolwork well below what school expects.
• A teacher who raises a concern about learning.
• Extreme upset about schoolwork.
• Complete avoidance of school or learning.
• Hopelessness about learning.
• Sadness or worry that lasts.
• Significant delays in speech, language or motor development.
• A skill that was there and has gone. Our position is that a lost skill goes to a doctor first, not a tutor.

If no skill has gone, start with the teacher. Say what you are seeing at home, and what you have tried. Beyond the teacher, the right person depends on what it turns out to be about. If the work is too hard, someone who works on that school skill. If worry or mood is the thing, someone who works with children's mental health. In our view, delays in speech, language or movement are worth raising with your child's doctor. In our view, if you are worried enough to ask, a professional evaluation is worth asking about.

Any talk of hurting themselves is a same-day call to your doctor or a crisis line.