get an/the itch to (do something)
To become interested in or desirous of something. I've got the itch to go on another road trip, but I'm not sure where to go. I know she says she's given up acting, but I'm sure she'll get an itch to do it again sooner than later. Every so often, I get the itch to give up city life and move to a farm in the country.
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