Due to the varying nature of ADHD, not all patients will have exactly the same symptoms. Unfortunately, there is no blood test or brain imaging exam that can diagnose the condition. Thus, ADHD is only diagnosed through a series of exams, many of which may be different from one evaluator to another. Perceptions exist that ADHD is either overdiagnosed or may not exist at all.
It seems that whenever someone tells you that they or their child have ADHD, there seems to almost always be an "and" which follows. As in, "I have ADHD and Depression" or "My son has ADHD, Bipolar Disorder, and a learning disability. It seems more unusual to just have ADHD and nothing else than it does to have multiple diagnoses…