After death, a decomposing body can create that illusion. The question Is it true that your hair and nails continue to grow after you die? The science In the 1920s, author Erich Maria Remarque in his novel All Quiet on the Western Front imagined how nails would continue to grow so long after death that they would “twist themselves into corkscrews” and hair would flourish “like grass in a good soil”..
