Attention-Deficit Hyperactivity Disorder or ADHD is a chronic condition that causes attention difficulty, above-normal levels of hyperactivity, and impulsiveness. This disorder often begins in childhood and can persist into adulthood. 

ADHD may cause low self-esteem, troubled relationships, and difficulty at school or work. People with this disorder may also have trouble focusing their attention on a single task or sitting still for long periods of time.

Treatments include medication and talk therapy.