ADHD symptoms and the causes have had a controversial history. Because some believe that it that it may have been damage to the brain during pregnancy or delivery period and some other believe that it is genetic problem.

ADHD symptom always depends on the age and developmental level of patients. The appearance may develop from one to another attention disorder, such as when the youth becomes an adult.

There have been various different thoughts as to whether ADHD symptoms should be focused on the categories of inattentiveness or hyperactivity. These all tell a changing definition of the constitution of ADHD symptoms.

There are two label of ADHD symptom:

1. Inattention.

1. Often does not provide close concentration to details and makes careless mistakes in daily life.
2. Often has difficulty behind attention through tasks.
3. Often does not appear to listen when speak to straight.
4. Often does not follow-through on orders and fails to come to an end their work in the office.
5. Often has trouble to do any task.
6. Often does not desire to do things that get a lot of psychological effort?
7. Often loses things desired for tasks and activities as toys, school homework, books, or utensils.

2-Hyperactivity and Impulsivity

1. Often nervous with hands or feet or other circumstances.
2. Often reveal out answers before questions have been finished.
3. Often weeps about or laugh when and where it is not.
4. Often feel complexity awaiting twist and often intruding on others.
5. Often show as he is driving a motor.
6. Often discussion excessively.

Upper seven symptom meet in pre six month and other 6 meet in past six month. But sometimes both meet in patient. Some times medical situation, usual personality change, emotional troubles, or home stress-factors can upset a child's attention, and make the child exhibit symptoms of ADHD.