student asking question

What does "scratching one's head" mean? Is it an idiom?

teacher

Native speaker’s answer

Rebecca

"Scratching one's head" in this scenario is an expression that means you are confused or puzzled about something. You are not sure of what the answer is or how you are going to do something. Ex: She scratched her head over the confusing riddle. Ex: I scratch my head when it comes to math.

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