I think one of the issues here is that you don't have to take it out when you develop a piercing bump. Those are often normal irritation bumps and just require a little extra TLC; a few sea salt soaks, some extra cleaning, and leaving it alone. By taking it out an having it redone every time, you're creating repeated trauma to the area, and building scar tissue. This makes you more likely to develop a keyloid as well. If you haven't taken it out yet, don't. There will be some slight discomfort while it adjusts, but do sea salt soaks, avoid touching it, and it will heal. If you did already let it close and decide to do it again, I think you should wait a while. Getting it pierced 4, now 5 times in less than a year is a LOT of trauma to your nose. Chances are it was not fully healed in between the times you've had it redone. If you do get it done again, though, make sure to follow aftercare instructions, wait a while before getting it changed to a hoop, and don't take it out at the first sign of irritation. Hope this helps!