From having schizophrenia or bi-polar disorder say, to experiencing common depression due to finances for example...

There's a pretty broad spectrum in there...

The difference between troubled and ill is pretty defined isn't it?

A bloke can see someone is troubled....takes a professional to diagnose an illness.

Anyway troubled/ill, these are just words... I'm ill. Am I troubled? Well, yes.

Uhhh...wot's the question???