It usually smells because of the food that latches onto the piercing after you eat.Its like when you don't brush your teeth and the food in the mouth goes bad and smells.Only difference is that the food also stays on the piercing causing it to smell after a while.
it shouldnt smell at all not unless its infected
I have a lip piercing and it doesnt smell, if it does then its probly infected
Because you not cleanning it propely ! It can happen to your ears as well, yoe need to give it and good clear the bar and the hole itself okay ! Any help ? Xx
That's nasty. It's infected. Here's a site that has some information on how to clean your lip piercing properly.