Board Thread:Boruto Discussions/@comment-36498596-20180807130711/@comment-6769189-20180808064311

Kyle Ethan wrote: Starscream1998 wrote: Speaking of which those dark lines around his eyes, mascara or sleep deprivation? That's due to the Magnet Style inherited from his father. Probably not. His dad didnt have it all the time, only when he actually used magnet release.

Having not slept for so long, its possible they wont go away. It might also be because he was exposed to Shukaku's chakra before birth, kinda like how Naruto/Himawari/Boruto have whisker marks.