By Louis' two ankles, one says "the" and the other says "rogue".
Louis has a tattoo of a heart on his shoulder and under that is a .. reindeer .. I think .. ?
These are most of Louis' little tattoos on his arm.
Louis has a tattoo on his chest that says "it is what it is" and a tattoo that says "70" is under that.
Louis has a tattoo of a tangled (in an infinity shape) rope that's broken in the middle, around his wrist.
Louis has a tattoo of a cup of tea, which is for the lyric in their song 'Little Things', "...you can't go to bed without a cup of tea.." He also has a tattoo that says "oops!" under that.
Louis has a tic tac toe tattoo on his forearm.
Louis has a tattoo of a bird on his arm by his wrist.