Help about my piercing???

I heard that this is some type of infection but it's happened to me about 3-4 times now. How do I stop it!?? It just ends up bursting and bleeding a lot and then healing after a week and just starts over again the next week like now. P.S this is a belly button piercing and I leave it alone for the most part unless I'm cleaning it I don't understand why it's doing it I've had this since the start of December