A repaired earlobe can tear again due to trauma or wearing heavy earrings regularly. You can prevent a future tear by waiting two to six months after surgery before piercing your ears again.
You should get your new piercing above or to the side of your scar to lower your risk of splitting your earlobe. It is also a good idea to stay away from heavy jewelry. The same goes for dangling pieces that can be pulled or get caught on your clothing.