Childhood attention deficit hyperactivity disorder (ADHD in children) facts Attention deficit hyperactivity disorder ( ADHD ) is a mental-health condition. Childhood ADHD symptoms include difficulty concentrating , controlling impulses, excessive activity. Though there is no particular cause of ADHD , there are many social, biological, environmental factors that may raise one's risk of developing or being diagnosed with the disorder. There are three kinds of ADHD: predominately inattentive, predominately hyperactive/impulsive, and the combined (inattentive, hyperactive, and impulsive). While medications are commonly used in the treatment of ADHD, behavioral therapy is important in improving the child's ability to function as well. The most common medications used to treat ADHD are the stimulant medications. About 85% of children with ADHD are at risk for having the disorder in adulthood. Much of the latest research on ADHD in children focuses on ...