ADD/ADHD is a condition that confuses quite a few people. There are questions about who it affects, if it is curable, and even when it appears in people. In fact, the latter is one that is a common question. ADD and ADHD can appear in children and adults, but the most common time for a diagnosis is when a person is a teenager. With medication, you can control the symptoms and a person can live a normal life with ADHD. If you suspect you or a loved one has ADD/ADHD take our online test.