concern (oneself) about (something)
To become focused on someone or something because one feels partly responsible for dealing with it. Your mother really doesn't need to concern herself about our financial issues—we're perfectly capable of sorting them out on our own.
concern oneself about someone or something
and concern oneself over someone or somethingto turn one's thoughts and consideration to someone or something. I hope you will concern yourself over your work a little more. Please don't concern yourself about me. I'll do okay.