What is the primary cause of attention deficit hyperactivity disorder (ADHD) and which factors are believed to contribute to it?

Updated: Sep 09, 2021
  • Author: Maggie A Wilkes, MD; Chief Editor: Caroly Pataki, MD  more...
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At present, genetic loading appears to be the primary and perhaps only cause of ADHD (ADD). However, many environmental factors have been correlated with ADHD (ADD), and future research may prove these to be etiologic factors. Morbidity, as evidenced by signs and symptoms in people with ADHD (ADD), may be strongly correlated with the patient's home and school environments.

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