Attention Deficit Hyperactivity Disorder: Symptoms of ADHD The
symptoms of ADHD include inattention and/or hyperactivity and
impulsivity. These are traits that most children display at some
point or another. But to establish a diagnosis of ADHD,
sometimes referred to as ADD, the symptoms should be
inappropriate for the child's age. Adults also can have ADHD; in
fact, up to half of adults diagnosed with the disorder had it as
children. When ADHD persists into adulthood, symptoms may vary.
For instance, an adult may experience restlessness instead of
hyperactivity. In addition, adults with ADHD often have problems
with interpersonal relationships and employment.