Overview Adult attention-deficit/hyperactivity disorder (ADHD) is a mental health disorder that includes a combination of persistent problems, such as difficulty paying attention, hyperactivity and impulsive behavior. Adult ADHD can lead to unstable relationships, poor work or school performance, low self-esteem, and other problems. Though it’s called adult ADHD, symptoms start in early childhood and continue into adulthood. In … Continue reading Adult attention-deficit/hyperactivity disorder (ADHD)