What Causes ADHD?
The exact cause of ADHD is unknown
Scientists aren't sure what exactly causes ADHD. But scientists think ADHD is possibly caused by one or more of the following factors:
Genes may play a role in ADHD
Research suggests that ADHD tends to run in families. However this does not mean that all children in a family will have the disorder.
Neurotransmitter function could be involved
The brain uses various chemicals called neurotransmitters to help send messages across the nervous system. An imbalance of these chemical messengers may result in the inattentive and hyperactive/impulsive symptoms of ADHD.
Certain environmental factors may play a role, too
Certain external factors, such as smoking during pregnancy or complications from pregnancy, delivery, or infancy, may contribute to ADHD.