It doesnt
To accidentally tear off your smiley piercing get an injury that will scratch the area of your smiley piercing.
You're piercing your back?
Check with your local piercing parlor?
How long it takes a smiley piercing, or any piercing to heal up will depend greatly on the care given. Making sure to keep the piercing clean can help it to heal as quickly as possible.
A Smiley Piercing is a piercing done generally with a circular barbell, captive bead ring or a bent barbell in the frenial web above the front teeth, between the top lip and gums.
mine cost $40
The only way to know how much your piercing will cost is to contact your piercing studio and ask them.
NOWHERE
around 70dollars each piercing where i live
because when you smile it shows, it's a piercing through the skin on your inner lip
30 buks