ADHD symptoms in children
Children with ADHD show persistent inattention, hyperactivity or impulsivity across home and school that is out of step with their age and gets in the way of learning and friendships. Evaluation for children happens through a pediatrician, child psychologist or school team; our own service assesses adults 18 and older only.
Clinically reviewed · Updated October 2, 2026
ADHD is one of the most common neurodevelopmental conditions of childhood. The CDC estimates that roughly one in ten US children aged 3 to 17 has been diagnosed at some point, with boys diagnosed about twice as often as girls. Recognizing it early helps, because support at school and at home makes a real difference to learning, friendships and self-esteem.
Before reading on, one important note. Our service assesses adults aged 18 and older only. This page is here to help parents understand what they are seeing and where to go. If you want an evaluation for your child, your pediatrician or your child’s school is the right first call.
What ADHD looks like in children
The DSM-5-TR describes two groups of symptoms (American Psychiatric Association, 2022). A child up to age 16 needs at least six of nine symptoms in a group, lasting six months or more, to meet that group’s threshold.
Inattentive symptoms
- Missing details and making careless mistakes in schoolwork
- Trouble staying focused on tasks or play
- Seeming not to listen when spoken to directly
- Not following through on instructions, homework or chores
- Trouble organizing tasks and belongings
- Avoiding homework or anything that takes sustained mental effort
- Losing school supplies, jackets, lunchboxes and permission slips
- Being easily distracted
- Forgetting everyday things
Hyperactive and impulsive symptoms
- Fidgeting, squirming or tapping
- Leaving their seat when expected to stay sitting
- Running or climbing when it is not appropriate
- Being unable to play quietly
- Seeming constantly on the go, as if driven by a motor
- Talking excessively
- Blurting out answers before the question is finished
- Trouble waiting their turn
- Interrupting or butting into games and conversations
Lots of children do some of these things some of the time. ADHD is suspected when the pattern is persistent, clearly more than other children the same age, present both at home and at school, and getting in the way of learning or friendships. Several symptoms must have appeared before age 12.
Depending on which groups a child meets, the diagnosis is predominantly inattentive, predominantly hyperactive-impulsive or combined presentation.
Girls and boys
Boys are more likely to show hyperactive and impulsive behavior that disrupts a classroom, so they are referred for evaluation more often. Girls more often have the inattentive presentation. They daydream, lose things, run late and struggle quietly with homework, and they may be described as shy, dreamy or disorganized rather than evaluated.
Girls with ADHD are also more likely to be diagnosed with anxiety or depression first. Those conditions can be real and can co-occur, but they can also be the visible result of years of unrecognized ADHD. If your daughter is bright, anxious and chronically behind despite effort, it is worth raising ADHD with her doctor.
When to seek an evaluation
The American Academy of Pediatrics supports ADHD evaluation for children aged 4 to 18 who have academic or behavior problems along with signs of inattention, hyperactivity or impulsivity. Consider asking for one if:
- Teachers have raised concerns about attention or behavior
- School results do not match how capable your child seems
- The same difficulties show up at home and at school
- The pattern has lasted six months or more
- Your child is struggling to make or keep friends
How children are evaluated
A good childhood evaluation gathers information from more than one person. It typically includes rating scales completed by parents and teachers, a developmental and family history, observation of the child, and screening for learning disabilities, anxiety, sleep problems and other conditions that can mimic or sit alongside ADHD.
Two routes are open to most families. Your pediatrician can begin the process and refer to a child psychologist or developmental specialist if needed.
Separately, you can request in writing that your child’s public school evaluate them for a learning or attention difficulty, which can lead to a 504 plan or an individualized education program. The two routes can run in parallel.
Why this matters for adults too
Many adults first recognize their own ADHD while reading about their child’s. ADHD is highly heritable, and the lifelong pattern of lost keys, missed deadlines and racing thoughts suddenly makes sense when you see it in a seven-year-old.
Adult ADHD is also diagnosed partly on childhood history, since several symptoms must have been present before age 12. Our guide to adult ADHD symptoms explains how the same condition looks after adolescence, including why it is often missed in women.
If you recognize yourself
Our online assessment is for adults 18 and older. It is reviewed by a state-licensed clinical psychologist within 48 hours, and is followed by a 30-minute video appointment. The diagnosis is made against DSM-5-TR criteria and the written report is accepted by prescribers, employers and schools. We diagnose but do not prescribe.
You can read about how it works or start the assessment. For your child, please speak with your pediatrician or school. If anyone in your family is in crisis, call or text 988 to reach the Suicide and Crisis Lifeline.
Common questions
Do you assess children for ADHD?
No. Our online assessment is for adults aged 18 and older. For a child, start with your pediatrician or ask the school about an evaluation. Parents who recognize their own symptoms while reading about their child are welcome to take our adult assessment.
At what age can ADHD be diagnosed in a child?
The American Academy of Pediatrics supports evaluating children from age 4 through 18 when there are concerns about attention, hyperactivity or impulsivity. Many children are diagnosed in early elementary school, when classroom demands make symptoms more visible.
How many symptoms does a child need for a diagnosis?
Under the DSM-5-TR, children up to age 16 need at least six of nine symptoms in a domain, lasting six months or more, present in two or more settings, and causing real difficulty. From age 17 the threshold drops to five.
Why are girls diagnosed less often than boys?
Boys more often show the hyperactive and disruptive behaviors that get noticed. Girls more often have the quieter inattentive presentation and may be labelled dreamy or shy instead. Girls are also more likely to be diagnosed with anxiety first, which can delay recognition of ADHD.
If my child has ADHD, could I have it too?
It is possible. ADHD runs strongly in families, and many parents first recognize their own lifelong patterns while learning about their child's. If that sounds familiar, an adult assessment can give you a clear answer.