The popular narrative about ADHD being a "trendy diagnosis" has it exactly backwards, according to new research from the University of Southampton. Far from being overdiagnosed, people with ADHD are facing dangerous delays in assessment and treatment—with some waiting years for help.

The study, published in the British Journal of Psychiatry, analyzed diagnostic data and found no robust evidence that ADHD is overdiagnosed in the UK. Instead, NHS data shows diagnosis rates remain substantially below expected levels.

Here's the reality: standardized diagnostic criteria indicate ADHD affects approximately 5% of children and 3% of adults internationally. England's NHS data sits well below those benchmarks. The math is clear—we're missing cases, not creating them.

Professor Samuele Cortese puts it bluntly: "Rather than focusing on increases or decreases in diagnostic rates, attention should be directed toward the extent to which those with ADHD are being adequately diagnosed and treated."

The waiting times tell the real story. Among diagnosed children and young people, 27% reported waiting one to two years for assessment. Another 14% waited two to three years. That's not a system plagued by overdiagnosis—that's a system struggling to meet demand.

And the demand is growing, particularly from adults who went undiagnosed in childhood. These aren't people chasing fashionable labels; they're individuals whose symptoms have impaired their lives for decades finally seeking help.

Professor Tamsin Ford captured the paradox: "While many more people with ADHD are being recognised and treated, we are failing to support many more."

The stakes aren't trivial. Untreated ADHD correlates with academic failure, substance abuse, and increased injury rates. When diagnosis is delayed by years, those risks compound.

Now, the "everyone has ADHD" meme does reflect something real: increased awareness. Social media has made ADHD symptoms more visible, and that visibility drives people to seek assessment. But awareness creating demand for proper evaluation is not the same thing as overdiagnosis. It's the system working as it should—or trying to.