Learn English – “Bump one’s head on something” vs. “against something”

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Can anyone help me understand the difference between bumping one's head on something and bumping it against it? Is there any substantial difference or are they used interchangeably?

Best Answer

"Bump on something" refers to the physical act of running into something. The most common usage of "against something" seems to be as a metaphor, as in "She bumped against the glass ceiling".