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Topic Overview
What is attention deficit hyperactivity disorder (ADHD)?

Attention deficit hyperactivity disorder (ADHD) is a condition in which a person has trouble paying attention and focusing on tasks. It may begin in early childhood and can continue into adulthood. Without treatment, ADHD can cause problems at home, school, work, and with relationships. ADHD was once called attention deficit disorder (ADD).
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What causes ADHD?

The exact cause is not clear, but ADHD tends to run in families.
What are the symptoms?

The three types of ADHD symptoms are:

* Trouble paying attention. People with ADHD are easily distracted and have a hard time focusing on any one task.
* Trouble sitting still for even a short time. This is called hyperactivity. Children with ADHD may squirm, fidget, or run around at the wrong times. Teens and adults often feel restless and fidgety and are not able to enjoy reading or other quiet activities.
* Acting before thinking. People with ADHD may talk too loud, laugh too loud, or become angrier than the situation calls for. Children may not be able to wait for their turn or to share. This makes it hard for them to play with other children. Teens and adults seem to "leap before they look." They may make quick decisions that have a long-term impact on their lives. They may spend too much money or change jobs often.

How is ADHD diagnosed?

ADHD is often diagnosed when a child is between 6 and 12 years old. Teachers may notice symptoms in children in this age group.

First, the child will have a physical exam to make sure that he or she does not have other problems such as...