Have you heard about the latest plastic surgery craze, belly button surgery? It's when those that are self-conscious about their "outie" belly buttons (a convex navel, a.k.a. when a belly button sticks out) into "innies." For some this is simply a cosmetic fix, for others the reasons may be medical. Here are the 8 things you MUST know about belly button surgery--whether you're just curious or are genuinely considering the procedure. 

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