Finchburg: Does the dark mark remain on those that voldemort has branded after his death or does the tattoo dissapear now he is gone thanks for considering my question!
J.K. Rowling: My pleasure, Finchburg! The Dark Mark would fade to a scar, not dissimilar to the lightning scar on Harry’s forehead.
J.K. Rowling: Like Harry’s, these scars would no longer burn or hurt.