There are many theorized causes including food intolerances, family stresses, the disorder is often coupled with other coexisting conditions such as FAS. It was previously believed that ADD was due to head traumas and a small number is still affecte dthis way. There is no tried and tested way to disclose the cause in any one individual
Scientists are not sure what causes ADHD, although many studies suggest that genes play a large role. Like many other illnesses, ADHD probably results from a combination of factors. In addition to genetics, researchers are looking at possible environmental factors, and are studying how brain injuries, nutrition, and the social environment might contribute to ADHD.
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