Ideally, you should wait at least three times as long as the advised healing period before attempting any stretch. Stretching piercings takes time and patience. Scar tissue can build up and create ugly, problematic piercings that can be difficult to stretch. This allows the new skin some time to thicken and toughen up before it gets traumatized by the enlarging process. If you do decide to start to stretch your piercing keep the area clean, you may find that your stretch will smell this is due to a build-up of dead skin cells and bacteria.