Overall, hyperactivity tends to diminish with age. But inattention tends to last into adulthood.

Treatment can help. And a great many children with ADHD ultimately adjust. Some — about 20% to 30% — have learning problems that ADHD treatment may not help, though.

As they grow older, some teens who’ve had the disorder since childhood may have periods of anxiety or depression. When there are more demands at school or home, symptoms of ADHD may get worse.

A child with hyperactive behavior may get symptoms of other disruptive disorders, like oppositional-defiant disorder.

These children are especially at risk to be more likely to drop out of school. If you’re concerned, talk to your or your child’s doctor about your treatment options. Medications, behavioral therapy, and other tactics can help.