The exact causes of ADHD are not known.
Experts know that there are differences in brain chemistry and brain activity among people with the condition as compared with those who do not have ADHD. ADHD is not caused by home or school situations or by poor parenting.
Here is what the experts know:
- Studies of the brain and its functioning show that children and adults who have ADHD are likely to have abnormal functioning (dysregulation) of certain neurotransmitters (chemicals in the brain), as well as in the nerve pathways that regulate behavior.
- There is a genetic link. ADHD tends to run in families. If one or both parents have ADHD, their children are more likely to develop the condition.
- Another factor that may play a role in causing ADHD is the presence of certain toxins in the environment, such as lead. Such toxins can interfere with the brain development of children exposed to them and possibly lead to ADHD.
- Studies show pregnant women who smoke or drink alcohol may have an increased risk of having a child with ADHD.
Research has shown that there is no evidence that ADHD is caused by:
- Eating too much sugar
- Allergies
- Immunizations
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Know someone who could use this information?...send themThis information is provided by the Cleveland Clinic and is not intended to replace the medical advice of your doctor or health care provider. Please consult your health care provider for advice about a specific medical condition. This document was last reviewed on: 8/1/2008…#11721
