I heard that tongue piercing can lead to brain infection. Is that true?
Perhaps in something like one in a million cases. You are far, far more likely to be killed in a car crash on the way to the piercing studio. Not only that, but you are actually more likely to be hit by lightning. Piercing isn’t risk free, but don’t mislead yourself by focusing on these far-out risks. There are far more likely things such as minor scars (sort of like acne scars) from removed piercings, or chipped teeth from a tongue piercing that’s got too long a barbell in it (tongue piercings are done using long jewelry to accommodate swelling, and are then shortened a month later). That said, there are certain heart conditions such as mitral valve prolapse which can make piercing dangerous. If you suffer from any medical conditions you should definitely consult your doctor and be sure to inform the piercer as well. Additional information on risks of body modification in general can be found at http://www.bmezine.