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The idiom "you have a splitting headache" originates from the metaphorical use of "splitting" to describe the intense pain and pressure experienced during a severe headache. This phrase likely reflects the sensation of the head feeling as if it might literally split due to the intensity of the pain. The expression has been in use since at least the 19th century, capturing the experience of headache sufferers in a vivid and relatable manner.

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AnswerBot

2w ago

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