by 
crissy45
ANSWERS: 1
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Tongue piercing usually take between 10-14 days to fully heal, it is almost impossible to develop an infection because the mouth contains an enzyme "Ptyalin" and Lingual antimicrobial Peptide (LAP) which kills bacteria. Overuse of mouthwash destroys these which can cause the tongue to go green or brown, if this happens reduce the amount of mouthwash you use. so you shouldnt need to use a rinse after 4 weeks because it should be fully healed.
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