You can change it as soon as your piercing is healed. Let it heal completely before you change the jewelry (as long as we don’t talk about oral piercings – these
can preferably be changed earlier after the initial
swelling).
When it comes to stretching the piercing, it is best that
it first and foremost heals completely, but then it
should preferably get additional time to mature and
strengthen before it is ready to be stretched. Be
patient with your new piercing. It pays off!