Consult with a healthcare professional regarding your outie belly button. The only way to change your belly button to an innie is through a surgical procedure known as an umbilicoplasty. You'll need to make sure you're in good enough...
For teens those who are urged by their parents, it may be ill-advised, prominent plastic surgeons tell WebMD. The key is making sure that the teen is emotionally and physically mature enough to undergo the chosen procedure.