It depends on the person, I think. I take a little longer to heal with piercings, but I've also discovered that I'm allergic to surgical steel ear rings and need to use gold ones or I'm gonna be unhappy. If you're boxing a lot, I'd personally recommend waiting a while. I've got two piercings in each ear but I haven't worn any ear rings in either ear for well over a year now. I'm just too prone to forgetting to take them out before sparring.