Meaning of the word "on your mind" in English

What does "on your mind" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

on your mind

US /ɑn jʊər maɪnd/
UK /ɒn jɔː maɪnd/
"on your mind" picture

Idiom

occupying one's thoughts; worrying or concerning one

Example:
You look troubled. What's on your mind?
I've had a lot of things on my mind lately.