Has he done the screening test on ADHD UK?
I was late diagnosed ADHD earlier this year - so much of my life, experiences and behaviours make sense now and medication has helped - but what has helped more is just knowing and being able to research and understand why I feel like I do and identify coping and support strategies. I also now understand why the usual organisational strategies have never worked for me and can seek out solutions that are ADHD specific.
I won't go into too much detail here about how it affected me (happy to talk via PM if it helps), suffice to say that despite my undiagnosed ADHD I did well at school, uni and in my career because I find some things really easy - but my ADHD has definitely been the cause of a number of issues which have affected all areas of my life. It all came to a head when I suffered a period of burnout which I now know was due to a combination of peri-menopause and undiagnosed ADHD but which very nearly resulted in a complete breakdown.
Despite the medication I still struggle and haven't yet fully got the condition managed but I am in a better place than I was because I know why.
My biggest regret is knowing that I did ok despite my ADHD but wondering what could have been if I didn't have it or had it diagnosed as a child and received the right support - I almost certainly would have more money in the bank and would most likely have had a very different career.
My 13 year old DD heard me talking to DH about my diagnosis and recognised some of the issues in herself. I had thought that she was probably ADHD but hadn't voiced this out loud to anyone. She took it on herself to do the screening tests and when it came back with a score that suggested she should get an assessment, she came and asked me if she could.
We are currently working with the school to get her an assessment - the problem is, she is so bright (scarily so) and engaged at school and masks really well, that none of her teachers can see it. But the mask comes off completely when she is at home, so we see the outpouring of anxiety, stress, taking on too much, perfectionism and impulsiveness.
We are using some ADHD techniques which are helping regardless of whether she is formally diagnosed. If she doesn't have it but the techniques help, then no harm done. If she does have it, she may be fine without medication, but she wants the assessment because she hates the not knowing and lack of certainty.
For my part, I want her to know so that if she does have ADHD and she starts to find things more difficult as she gets to GCSE's, A-Levels and uni, she can access the right support. I don't want her to be in my position in 30 years time, looking back and knowing that she could have achieved so much more.