Under your nose
Meaning
Right in front of you and easy to miss.
Usage
Used when someone overlooks something obvious.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Literally beneath one's nose but still visible.
Used throughout the 19th century to describe obvious details.