School is more structured than it feels at the time. Timetables decide where you are. Teachers decide what is due and when. Parents notice what is not done. For a bright student with underlying ADHD, this scaffolding can carry them a long way — sometimes all the way to excellent results.
University removes almost all of it at once. Lectures are optional. Deadlines are distant, then suddenly not. Reading lists are suggestions. Nobody checks. For many students this is liberation. For some, it is the moment the wheels come off.
Inconsistency is the signature
The pattern is rarely a simple inability to work. It is inconsistency that defies explanation: an essay written brilliantly in one night, followed by three weeks of being unable to open the reading for the next. Deep fascination with one subject, paralysis in the face of another. A growing gap between what the student knows they can do and what they actually produce.
Students in this position often blame themselves — for laziness, for poor discipline, for not wanting it enough. It rarely occurs to them that the difficulty might have a name, and a history that predates university by years.
What an assessment can offer
An adult ADHD assessment at university age is not about excuses. It is about understanding how you work before the stakes rise further. A clear diagnostic report can also support applications for reasonable adjustments and, where appropriate, Disabled Students’ Allowance — practical changes that level a playing field rather than tilt it.
If university has changed the equation for you, it is reasonable to ask why. The answer, whatever it turns out to be, is more useful than the question left unasked.