can you put in your own earring straight after it has been pierced

I've had 14 piercings in the last year and I've found that you can change them from pretty much after the swellings gone down but it's better to leave the bar/studs in for a couple of months. Saying that, I got one a year ago and it's still healing and swells quite a lot... all my lobe ones have healed fine in a couple of days and they've been done with guns (:

some think only gays have their ear pierced .. ikr :L