Possible Causes of ADHD

If your child has been diagnosed with ADHD, you’re not alone: ADHD is one of the most common childhood brain conditions. Researchers still don’t know the exact cause, but they do know that genes, brain differences and some outside factors like prenatal exposure to smoking might influence your child’s chances of having ADHD.

http://www.ncld.org/types-learning-disabilities/adhd-related-issues/adhd/possible-causes-adhd

What Causes ADHD? Possible Causes of ADHD