This is a common disorder of childhood. It affects behavior. It can cause problems with social interactions. It can cause problems with learning. A person who has ADHD may have these problems throughout life.

If you're an adult and you have trouble paying attention and controlling your actions, you may have ADHD. It's a problem that begins when you're a child and continues throughout your life. But because the symptoms of ADHD may go unrecognized for years, you may not be diagnosed until you are an adult. ADHD can hurt your relationships and your career.

This complex disorder is commonly called "autism." It affects the way people understand the world around them. It affects the way they think and feel. It affects the way they interact with others.

This is a group of emotional and behavioral problems in children. With it, a child does defiant and impulsive things. The child may break rules and cause problems for himself or herself and for other people. Eventually, this can lead to criminal behavior.