In some cases too, adults who were never diagnosed as children may develop more obvious symptoms when they become adults., causing trouble on the job or in relationships. Many adults don’t realize they have ADHD, leaving them mystified about why their goals seem to slip out of reach.
Adults with ADHD may have trouble prioritizing, starting, and finishing tasks. They tend to be disorganized, restless, and easily distracted. Some people with ADHD have trouble concentrating while reading. The inability to stay focused and follow through on tasks can derail careers, ambitions, and relationships.
In people with ADHD, brain chemicals called neurotransmitters are less active in areas of the brain that control attention. Researchers don’t know exactly what causes this chemical imbalance, but they think genes may play a role, because ADHD often runs in families. Studies have also linked ADHD to prenatal exposure to cigarettes and alcohol.