But just how does untreated ADHD impact real life, going to school or work and relationships among other life features? Things like forgetting something you just read or not being able to focus, from time-to-time, in some kind of unusual way here and there, are normal but if you often have trouble with attention and hyperactivity that leads to potential problems then it could be serious. The diagnosis of adhd diagnosis adelaide is the first step in learning more about these symptoms and how to deal with them.