Friend of mine got a bad injection from wrong type of ring inserted (sternum piercing) it was awful π
I read that this guy's tattoo actually wasn't the problem. He went swimming in a bacteria-infested pool (I forgot what kind of bacteria) and that's what caused the infection. His new tattoo was an open wound, and that's what allowed this to happen. This could've happened to anyone with any open wound in that pool, which is why they tell you not to go swimming after you get a tattoo