Usually, we get tattoos on purpose. But some injuries leave us with a different type of mark known as a "traumatic tattoo" — and these tattoos have nothing to do with needles or ink. So what exactly are traumatic tattoos?
Traumatic tattoos are formed when everyday materials, like graphite, dirt or gravel; or metal pieces, like shrapnel, become lodged beneath our skin, leaving a visible (and often long-lasting) mark.
