"They say the hair goes on growing sometimes"
Woman's corpse following the Allied bombing of Dresden (c. 1945)
Creative Commons Attribution Share AlikeWoman's corpse following the Allied bombing of Dresden (c. 1945) - Credit: Deutsche Fotothekā€Ž

This is something of an urban myth. Neither hair nor fingernails continue to grow after death, despite appearing to do so. This phenomenon is actually the result of the surrounding tissue drying out and shrinking away from the nail folds and hair shafts, making hair and fingernails look longer.