It is not uncommon to hear parents or adults say,"They will grow out of it", when referring to a variety of behaviors that are exhibited by children. It is true that children do learn and mature. They often become more socially skillful and sensitive to the needs of others as they mature and gain more experience in the world.
Regarding ADHD, which many professionals might identify as a neurbehavioral disorder, children will likely make a more positive adjustment to adulthood with professional intervention and treatment. This is primarily due to the nature of the disorder which is neurologically based.
Proper treatment would address a variety of issues which include individual counseling, parenting, and family communications. Parents need to be better at parenting than most parents to address the special needs of their child. They need to learn more about what they can do to help their child develop improved social skills and relate more effectively to others. Unfortunately children with this diagnosis are socially vulnerable and susceptible to excessive criticism and scapegoating in social situations. This can lead to a variety of additional emotional challenges
As children move into adulthood they often develop coping strategies to function in their world. The creative strategies they develop may be either helpful or unhelpful. The overactivity they once displayed may no longer be noticable to others but masked within themselves. Unhealthy coping strategies may leave them vulnerable to a variety of other health related issues which include depression and anxiety disorders.