After many studies it has been found that ADHD runs in families and in most cases, parents' genes are a major factor in the development of the condition. Research shows that children whose siblings or parents have the disorder are more likely to develop it themselves.

Another important cause of ADHD may be brain anatomy, its structure and function. Children with ADHD have been found to have reduced activity levels in certain areas of the brain. Some serious head injuries can also cause this condition to appear in children.

If this disease is not treated in time, its symptoms can become more complicated. You can buy ADHD pills without a prescription from an online pharmacy to help reduce the symptoms associated with the disorder.