Specifically the ones on cheeks, chins, and above your bum.
In: Biology
The ones that appear on cheeks occur because of a split in muscles that control your facial expressions, zygomaticus major. It’s almost like a gap that forms in the muscle of some people, it gives the appearance of simples. The one above your bum has to do with your anatomical structure and the shape of your lower spine. Not sure about the chin.
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