Attention deficit hyperactivity disorder (ADHD)
Also known as:
Attention deficit disorder (ADD), ADD, ADHD
Attention deficit hyperactivity disorder (ADHD) is a condition in which a person has trouble paying attention and focusing on tasks, tends to act without thinking, and has trouble sitting still. It may begin in early childhood and can continue into adulthood. Without treatment, ADHD can cause problems at home, school, work and with relationships. In the past, ADHD was called attention deficit disorder (ADD).