This is called a transdermal implant. It basically has a broader bottom than it has on the sides, kind of like a cufflink. The skin heals around it over time, a

This is called a transdermal implant. It basically has a broader bottom than it has on the sides, kind of like a cufflink. The skin heals around it over time, and it becomes a part of you eventually (assuming its not rejected by your body)