Hello!
This is Dr. Klarida Paqaqako answering your question.
There are 2 possibilities that the tissue growth in the piercing area can be:
1) If it hurts, seeps, have pus and/or bleeds it's probably either an infection or a sebaceous
cyst (which can become infected). In this case If I was your caring doctor, would recommend to cleanse 2-3 times a day with an antimicrobial soap, or apply a local tripple antibiotic (check if you are allergic to its components) if just soap doesn't help.
2) It can be a Keloid, which are formations of scar tissue that grow because the body over-defends itself as a result of trauma or surgical
incisions. If you are prone to keloiding, piercings are strongly urged against. There's no real limit as to where
keloids can form, as they can also grow on the tongue and other mucus membranes. The only way to truly prevent keloiding is to not get the tattoo or piercing. They need to be removed with the help of surgical removal if they happen.
Looks like the second option is most probably to be in your case.
Hope this helps,
Regards.