Key points

Many children with ADHD have symptoms that can remit for a while and then return.

A waxing and waning course of symptoms for ADHD may be even more common in adults than children.

For some people, symptoms of ADHD lessen over time and never return.

Over 11% of children are estimated to have a diagnosis of ADHD (Danielson et al., 2024), a rate that has doubled over the past 10 years.

ADHD is characterized by difficulties with focus, distractibility, inattention, hyperactivity, fidgetiness, and/or impulsivity. When symptoms are sufficient in number, severity, and stability – and they significantly interfere with functioning in more than one area of life – an individual may meet diagnostic criteria for ADHD.

ADHD is a neurodevelopmental disorder that is present from birth, a

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