Adults With Attention Deficit Hyperactivity Disorder (ADHD) As Adults, people have many roles and responsibilities that require focus, concentration, organisation and composure. Undiagnosed ADHD may cause people to handle certain responsibilities. This can have a negative effect on their lives, and can cause low self-esteem. In the UK in the https://www.iampsychiatry.uk/adult-adhd-assessments-and-treatments/