I have both nipples done and my belly done. As far as my belly is concerned, the hole is a little noticable when you take the ring out. I was more concerned with how naked my belly looked anyway. As far as nipples, I just got mine done (YAY!) so I can't answer your question about the scarring. After the healing period, you can take the jewelry out, but dont leave it out too long or youi'll close up
