Definition & Meaning of "load off one's mind "in English

What is the origin of the idiom "load off one's mind" and when to use it?

The phrase "load off one's mind" is an idiomatic expression that likely originated from the mental imagery of carrying a heavy load or burden in one's mind. It is used to describe the feeling of relief when a worry, problem, or concern is resolved or lifted, alleviating mental stress or anxiety.