ADHD Diagnosis Doubt: When People Don't Believe You
If someone has just told you ADHD is overdiagnosed, or a trend, or something everybody has a bit of, the thing worth holding on to is that their doubt is not evidence. Your evidence is the twenty or thirty years before anyone gave it a name. The appraisals that always said the same thing. The friendships you dropped without meaning to. The way your life changed once you finally understood what was actually happening in your own head. Somebody's opinion, however loudly it is broadcast, is not new information about you.
On 18 August, Channel 4 broadcast The Great ADHD Myth? and my inbox told me exactly what it had done. Not one client mentioned the science. They mentioned their brother. Their line manager. The person at work who has always thought they were a bit dramatic and now has a documentary to point at.
That is the bit nobody accounts for when they commission this sort of programming. The debate happens on television. The fallout happens in kitchens and one to ones.
Why does someone else's doubt hit so hard?
Because it lands on ground that has already been softened.
I explain it to clients like this. An ADHD child receives thousands of extra little emotional paper cuts growing up. Sit still. Try harder. You're so bright, if only you'd apply yourself. Individually none of them is a wound. Together they build something that means criticism in adulthood does not arrive as information, it arrives as confirmation of something you already half believed.
So when a stranger on television questions whether your diagnosis is real, the argument you are actually having is with a much older voice that got there first.
Across around 300 ADHD clients, this is the single most common pattern I see, and it is the reason self-belief has its own place in the model I coach from rather than being folded into confidence generally. It needs its own work.
Is rejection sensitivity even real, if the research is thin?
Worth saying plainly: the formal research on rejection sensitive dysphoria is genuinely limited. Writing in Psychology Today in April 2026, Dr Gilly Kahn reviewed the evidence and found five qualitative studies in total, samples ranging from four to forty three people, and no validated way of measuring the thing yet. RSD is not in the DSM-5-TR. Anyone telling you it is settled science is overselling it.
And in the same study set, 77% of the adults surveyed described experiencing it anyway (Ginapp et al., 2023).
Both of those are true at once. The label is young and contested. The pattern is enormous and everywhere. I have never once had a client feel better because a construct got validated in a journal, and I have had a great many feel better because someone finally described what happens to them out loud.
You do not need the science to catch up before you are allowed to work with your own experience.
What actually happened with the documentary?
The presenter, Dr Max Pemberton, had already published his position against the current approach to ADHD diagnosis in The Spectator in December 2024, which makes the framing of an open investigation a stretch. ADHD UK's response challenged the programme on several points, including a press claim about which group is most medicated, when NHS data shows adults are now the largest.
For context on the science the programme set aside: heritability of ADHD sits at around 74%, among the highest of any psychiatric condition, and the 2021 international consensus statement was signed by 80 researchers across 27 countries. Adults with ADHD have a mortality gap of roughly seven to nine years.
I will leave the picking apart of a television programme to other people. What I care about is what it cost the person who watched it sat next to their family.
What do you do when the doubt gets loud?
Separate the feeling from the evidence. That sounds tidy on the page and it is horrible in the moment, so make it concrete.
Write your evidence down before you need it. An actual file, the sort you can open at speed. The date of your assessment and who did it. Two or three moments from before diagnosis that make sense now and made no sense then. What has measurably changed since, whether that is medication, structure, coaching or just understanding. One line from someone who knows you well.
Then when the doubt shows up, there is nothing to dig for. You just read it back.
The second thing is quieter. Notice whose opinion you are actually chasing. Most people who publicly doubt ADHD are not going to be persuaded by you specifically, and the energy that goes into trying is energy you needed for something else. That is not a you thing. That is a them thing.
What if the person doubting you is your manager?
Then it stops being a feelings problem and becomes a workplace one, and it is worth treating it that way.
ADHD that has a substantial effect on your day to day activities is likely to meet the definition of a disability under the Equality Act 2010, which means reasonable adjustments are not a favour anyone is doing you. If your manager's scepticism is affecting how you are managed, put things in writing, keep a record, and get support from occupational health or Access to Work rather than trying to win the argument in the corridor.
I have written more about handling criticism at work in this piece on ADHD and hypersensitivity to criticism.
The bit I actually want you to take
You are not broken, and you were not fine before either. Both things were true the whole time. A television programme does not change either of them.
If this week has knocked you sideways and you would like to work on the self-belief side of it properly rather than white knuckling until the news cycle moves on, book a connection call and we can talk about what that would look like.
FAQ
Is ADHD overdiagnosed in the UK?
Assessment rates have risen sharply, largely because adults who were missed as children are now coming forward, particularly women. Rising diagnosis in a previously under-recognised group is what catching up looks like. Whether individual assessments are done well is a separate question from whether the condition is real.
Why do I still feel like a fraud when I have a formal diagnosis?
Very common, and it usually has more to do with years of being told you were lazy than with anything about the assessment. The diagnosis changes the explanation. It does not automatically change the belief underneath, and that belief is workable.
Should I tell my employer I have ADHD?
It depends on your workplace and what you need. Disclosure is what gives you access to formal adjustments and legal protection, and it does carry a risk of exactly the scepticism this article is about. Access to Work funding can be arranged without your employer covering the cost, which makes the conversation easier for a lot of people.
