A Lithuanian friend of mine asked me about 8 years ago now, "Why is it that you Americans make up names for all sorts of conditions?" I at first defended us stating that we are at the forefront of medical research - therefore, had all the answers and newest medical conditions labeled.
Boy was I wrong.
Boy was he right.
ADHD, in my realm, is a bunk label brought on by pharmaceutical companies and psychologists. More money in the bank. They know parents want their kids best in class and get smiley faces from their teachers.
Now all they hear is, "Jack, I believe your son may be ADHD. You should have him checked out." Thanks. Good tip. People love to be the 'doctor' - knowing all the conditions, terms, diseases - it makes them feel superior for some reason.
Ignore 'em. Your kid is likely fine.
If not fine, and you do see an issue with inattention, hyperactivity and all the other common 'symptoms', then let's address some of them.
What did kids drink mainly, let's say, 10 years ago?