Overdiagnosis is not a problem, but misdiagnosis may be as people are driven into the private sector by long waits, and sadly, missed diagnoses remain common —Tamsin Ford
Experts are warning that far from being over-diagnosed, people with ADHD are waiting too long for assessment, support and treatment.



Who are the current young people’s parents? Do you think any adverse effects are biologically inherited?
There is no evidence that lead poisoning, for example, can be inherited. There is some research that certain epigenetic changes can be inherited. The context is sometimes war and famine. But that is 2-4 degrees of abstraction away from your question, and we are many decades away from any kind of causative conclusion to that.
If I were to steelman your position, I think there are simpler changes to point to as potential causes here. Social media. Screen time. Time spent outside and exercising. Obesity. Time spent socialising. The new “permissive” method of parenting and teaching.