Hyperactivity disorder is a severe form of hyperactivity that is associated with significant inattention and is therefore also known as attention deficit hyperactivity disorder. The main clinical features of this disorder are: severe and persistent restlessness; constant and persistent movement; difficulty concentrating; and impulsivity and doing things without regard for consequences. The above characteristics manifest themselves differently in different settings, so parent and teacher observations may be inconsistent. Children usually act rashly and are prone to accidents. The disorder is often associated with learning difficulties due to inattention and lack of persistence on tasks. Mild antisocial behaviors are common, particularly defiance, rage, and aggression. However, these antisocial behaviors do not usually appear early in life. These children are often unpopular with other children. Mood swings, especially low self-esteem and depression, are common in children. Fidgeting, hyperactivity and their associated symptoms are common in preschool. Children become hyperactive in infancy and this problem becomes more pronounced when they are walking, always in constant motion, disrupting food and exhausting their parents.