How do clinicians tell ADHD apart from anxiety when the symptoms overlap?

This is a really common overlap, and sorting it out is more about patterns than single symptoms. Clinically, I look at what drives the distraction. With anxiety, attention usually gets pulled because the mind is preoccupied with worry, threat scanning, or fear of getting something wrong. If the anxiety settles, focus tends to come back. With ADHD, distraction is more about difficulty regulating attention even when you are calm or interested. The mind jumps, drifts, or gets pulled by noise and thoughts regardless of mood. Timeline matters a lot. ADHD patterns are typically lifelong. People describe being scattered, forgetful, or mentally busy since childhood, even if anxiety came later. Anxiety related concentration problems usually show up after stressors, burnout, or specific life events. Variability is another clue. ADHD attention fluctuates based on interest, novelty, urgency, or structure. You might focus intensely on one thing and be completely unable to start another. Anxiety tends to cause more global narrowing. Everything feels tense and effortful, not just boring tasks. Emotionally, anxiety is driven by fear and anticipation. ADHD frustration is often about effort and overwhelm. Many adults actually develop anxiety because they are constantly compensating for untreated ADHD. In those cases, treating the ADHD often reduces the anxiety. In real life, it is rarely either or. They often coexist and amplify each other. That is why good assessment looks at history, internal experience, triggers, and what improves symptoms. You are not expected to untangle this alone. Overlap does not mean confusion. It means your brain deserves a careful, nuanced look.