Just less than one per cent of people are born with the tiny holes, but they're a lot more common in parts of parts of Asia
DBMCI Egurukul - A preauricular pit is a small hole in front of the ear, toward the face, that some people are born with. This hole is connected to an unusual sinus
人類の「1%」しか居ない「耳に穴」が開く謎現象その原因が話題に!|きゃのん@2008のブログ|きゃのん@2008 公式備忘録━━━━(゚∀゚)━━━━!!! - みんカラ
Preauricular sinus or cyst removal
Some people are born with tiny holes above their ears – this is why - Mirror Online
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Ear infection - acute: MedlinePlus Medical Encyclopedia
Hole in Ear: What to Know