What is the short dark streak (that looks like bronzer) on my cheek? (photos)

So I've always noticed this but never thought about it until today. As long as I can remember (but perhaps not my entire life) I've had this small streak on my right cheek. It's not super noticeable and it's in a place where it kind of looks like I'm wearing bronzer to contour! I don't know my family history (I'm adopted) so I'm wondering if it's something I should get looked at. Is it a birthmark (it doesn't look like it) or something else? Hyper pigmentation?

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