hello and welcome to hcm forum,
I would be glad to answer your query, first of all i would like to inform you that tongue piercing
is not at all related to your tooth.
but infection following tongue piercing can cause numbness
of the tongue , sometimes infection becomes widespread causing sore throat
i would advise you to kindly remove the piercing and start with an antibiotic course.
i hope i answered your query,
i wish you good health,