Red sore blister on nose

It's in the final healing stage, thankfully. My nose got huge from this. I think the flakes of dry skin was from my nose stretching. Turns out it was infected. How, I have no idea. I woke up the other morning and blew my nose and noticed it was bleeding a little. I started to check it out and there was a bunch of puss coming out. It's all out now, but it was the least pleasant thing I've dealt with. It took a couple days to get the infection completely out, but I still don't know how it got that way. A few years ago I had my septum pierced, but it wasn't for very long and it's been out since at least 2009, so the hole is closed and there's just scar tissue now, but I don't see how it would be caused by that. I also thought that maybe it could be some form of skin cancer because my mom has had basil cell twice in the same spot on her nose and I thought maybe I had fallen victim to it too. If anyone else has had or has this problem, go see a dermatologist as soon as this happens. I'm glad my nose didn't get worse from this, but everyone is different and I know I'm not the only one who wouldn't want their nose to be the only noticeable thing on your face.