As a doctor, what are your biggest red flags that someone's self-diagnosis is off track?

Many adults now arrive for assessment already convinced they have ADHD, often after social media content or online checklists. That can be a helpful starting point, but there are some red flags that suggest the self-diagnosis may be off track and that a broader assessment is needed. One red flag is when symptoms are described only in the present, without a clear childhood history. ADHD is a neurodevelopmental condition, so difficulties with attention, organisation, or impulse control usually show up early and across multiple settings. Another is when symptoms fluctuate mainly with stress, burnout, poor sleep, relationship strain, or mood changes, which may point more toward anxiety, depression, trauma, or exhaustion rather than ADHD itself. Clinicians also become cautious when examples sound very general and lack concrete, lifelong patterns or real-world impairment. Another warning sign is when the assessment is viewed as a rubber-stamping exercise rather than a collaborative process, or when there is strong defensiveness if alternative explanations are explored. That defensiveness often reflects fear of not being believed, but it can get in the way of accurate diagnosis. Finally, a focus on a single diagnosis can obscure overlapping or more relevant issues, such as anxiety with cognitive fog, sleep disorders, substance effects, or chronic stress. Online information is a useful entry point, but careful clinical assessment exists to make sure the label fits the whole story — and that the treatment actually helps.