You have been in treatment for anxiety. The therapy helped. The medication took the edge off. There were real improvements, and you are grateful for them. And there is still a residue — a sense that something remains unnamed, that the floor never quite stops tilting.
You have wondered, quietly, whether this is just what life feels like. Whether you are the one making heavy weather of it.
The research suggests otherwise.
The number nobody told you
In a study of 264 people already in treatment for anxiety — assessed, engaged, taking the work seriously — 37.5% were found to meet lifetime criteria for ADHD. Of those, 76% had never been diagnosed or treated for it. These were not people avoiding help. They had sought it out for the anxiety they could feel. More than a third were carrying a second, unnamed thing underneath it. Three out of four had never been told it was there.
Read that slowly, because it reorders something. The anxiety was real. The treatment was reasonable. And still something kept not adding up — because the part underneath it had no name in the room.
A 2023 retrospective study of 337,034 adults newly diagnosed with ADHD (Schein, Cloutier, Gauthier-Loiselle et al., BMC Psychiatry) found anxiety disorders in 34.4% of the ADHD group, against 11.1% in the matched non-ADHD comparison group. More than three times the rate. The same study found the ADHD group was prescribed anti-anxiety medication at more than double the rate of their peers.
Read one way, that is a story about anxiety. Read another, it is a story about what anxiety so often sits on top of.
What high-functioning anxiety actually looks like from the inside
High-functioning anxiety is not a diagnosis. It is a description — of a person whose anxiety has been so thoroughly converted into competence that almost no one can see it. The inbox is clear. You arrive early. The meeting goes well. The distress is real, but it has been turned into output. And output does not look like distress. It looks like someone who has it handled.
What separates this from ordinary worry is where it attaches. Generalized anxiety tends to attach to something: the health scare, the money, the relationship. This kind often attaches to nothing in particular. It is a baseline hum that predates any specific problem and outlasts its resolution. You can fix the thing and feel no calmer.
That detail matters more than it seems. A worry that does not lift when the problem is gone is a clue. It suggests the worry is not really about the problem at all. It is about something running underneath — something the standard tools were never built to reach.
A 2024 study in Clinical Psychology and Psychotherapy by Kandeğer, Odabaş Ünal, and Ergün examined 159 adults with ADHD and found that excessive mind wandering and rumination fully accounted for the relationship between ADHD symptoms and anxiety severity — across every pathway they tested. Not partially. Entirely. The overthinking is not a side effect of the anxiety. It is the road the anxiety travels down.
Why the partial relief makes sense
If you have spent years in anxiety treatment and still feel like something is landing just above the real source, that is not a sign you did the work badly. It may be structural — the treatment was aimed, accurately, at the half of the picture that was visible.
There is a distinction the clinical literature draws between two kinds of anxiety. Primary anxiety is an anxiety disorder in its own right — the worry is the condition. Secondary anxiety is something else. It arises when a person must spend far more effort than a neurotypical peer to complete ordinary tasks, and the nervous system responds, reasonably, with alarm. The dread is not broken. It is an accurate signal about a chronic mismatch.
In the room, the two look identical — same racing thoughts, same bracing. But they do not answer to the same treatment, because they do not share a root. Cognitive-behavioral tools work skillfully on the thoughts. They were never built to reach the executive function system generating them. That is not a verdict on the tools. It is the reason the relief has been partial.
And here is the part worth sitting with: when the underlying ADHD is finally named and supported, secondary anxiety often drops — sometimes sharply — without any dedicated anxiety treatment at all. Not because the worry was fake. Because the strain producing it eased.
The three layers underneath
The anxiety you have been managing is not one thing with one cause. Research across multiple groups points to at least three forces running underneath it, each documented, each usually invisible.
The first is the executive load. Executive function — the set of mental tools that start tasks, hold a plan, and switch between things — runs differently in ADHD. When it does, the day fills with small slips and near-misses. A nervous system watching itself slip keeps making anxiety, the way a smoke detector keeps responding to smoke. The anxious thoughts are real. They are also, in part, a readout of the load underneath.
The second is the emotional weather. Shaw, Stringaris, Nigg, and Leibenluft found in their review in the American Journal of Psychiatry that between 30% and 70% of adults with ADHD experience genuine difficulty with emotion regulation — the system that sizes a feeling to the moment. When that system runs differently, feelings arrive faster and larger, with less of the automatic smoothing other people get for free. Each slip lands harder than the moment warrants. The shame about the size of the reaction is often what turns a hard feeling into a long one.
The third is the cost of masking. Van Der Putten and colleagues found in a 2024 study in Autism Research that adults with ADHD report significantly higher day-to-day masking than neurotypical adults — linked with greater exhaustion, more anxiety, and a sense of being cut off from their own needs. Appearing fine is sustained labor. Like any labor, it depletes the person doing it. And because it looks like competence from the outside, the depletion never shows on any measure that gets recorded.
Standard anxiety treatment tends to reach only the top of this stack — the thoughts. That is why the relief has been partial. Name and support the lower layers, and the hum at the top often quiets, because the things holding it up have finally been seen.
What changes when you name it
Nothing about your experience changes when you read this. The exhaustion is the same exhaustion. The overthinking, the bracing, the effort that never quite lands — all still here, all still real. What changes is the map.
A problem with a clear shape is easier to work with than a vague sense that something is wrong with you. You have not been failing a simple task. You have been managing a complex one, mostly alone, without the map.
The years before the name were not wasted, and they were not evidence against you. They were years of doing something genuinely hard without the manual — and getting through anyway. That is not a small thing. It was never the shortcoming it sometimes felt like at the time.
What an accurate map makes possible is not more effort. It is less wasted effort. When you stop treating a structural difference as a personal failing, the energy that went into self-correction becomes available for something else. The hard days stop doubling as evidence against you. You do not have to try harder — you get, at last, to try at the right thing.
If any of this describes the pattern you have been living in, The Performing Fine Problem: ADHD and High-Functioning Anxiety takes it further — naming the pattern precisely, laying the research out in order, and leaving you with something to keep for the days the old questions return loudest.
This post is for educational and informational purposes only and does not constitute medical, psychological, or clinical advice. If you are experiencing significant distress or have concerns about ADHD or a related condition, please consult a qualified professional.
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