Will your tattoo explode in an mri?

Excellent question... If the tatoo ink that the artist used contains ferrous ( iron and chromium ) metals, which many common tatoo inks do, the magnetic and radio waves will heat up the tatoo. It will sometimes be heated enough to cause second degree burns. Will it explode though? No. Sounds like fun doesn't it? There are even some MRI centers that won't do the MRI proceedure on a patient who has a tatoo since it's not possible in advance to tell whether the ink will, or won't be affected. Think twice about all this 'cause an MRI just might be needed to save you life sometime.