Chemical structure for Seratonin, which is a naturally occurring chemical in the brain that makes us feel happy and rewarded. So the tattoo is a daily reminder that I can be happy without meds. nerd science tattoo for the win.
atom tattoo with a purple dot in the center, no dots on the outer rings. because i once heard a story: the outer rings have the dots circling around just being on the straight narrow. the purple dot symbolizes me i'm in the middle being myself.