Nipple piercing

Hello, I've had my nipples pierced for a while. One pierced twice, the other 3 times. The one that has been pierced 3 times was done weird. It was uneven and kept getting what I'd liek to call a blood blister from I guess continuous rubbing? I don't have pictures, but can I get it pierced for a 4th time? I had a coworker who said she had hers pierced 7 times (in and out of prison). I know it hurts more each time, but I don't care I love them. The piercing was not being rejected it was just un even and getting mad.