No-one knows for certain what causes ADHD, and it is possible that a number of factors may contribute to its development.
ADHD comes with a number of positive as well as negative attributes. It is only when the negative attributes are very disruptive that they negatively impact everyday living.
ADHD tends to run in families so the leading theory is that ADHD is an inherited neurobiological developmental disorder and this effects about one in 20 people (5%) of the population.
ADHD is one of the most researched neurobiological developmental disorders in the world and while it may come with some controversies in regards to the various treatments available with continued research we will understand more.