Oct 06, · ADHD Symptoms in Adults: ADD Checklist. Attention deficit hyperactivity disorder (ADHD or ADD) is a neurological condition defined by symptoms of inattention and/or hyperactive impulsivity that interferes with daily functioning in at least two settings — for example, at work and at thumbed.xyzy two-thirds of people who experienced ADHD symptoms as a . What Is Attention Deficit Hyperactivity Disorder (ADHD)? Many people have heard of ADHD. It may make you think of kids who have trouble paying attention or who are hyperactive or impulsive. Adults.
The causes of attention deficit hyperactivity disorder (ADHD) are unclear, but the condition often runs in families. There appears to be a genetic and neurobiological basis for ADHD. Usually, adults with the predominantly inattentive form of ADHD first developed it during childhood and adolescence.