Do hair and fingernails keep growing after death?

Hair and fingernails do not continue to grow after a person dies. The impression that they do comes from changes in the surrounding skin. The body loses water, the soft tissue shrinks, and the hair and nails are left standing out more than before. Sources including a university dermatology clinic, Snopes and the BMJ all describe this as a myth with a real physical basis. [1] [2] [3]

After death the body dehydrates. The skin and other soft tissues dry out and pull back, while the hair and nails stay the same length. According to the UAMS Dermatology Clinic, this creates the optical illusion of growth. Snopes gives the example of a toe: the nail on it stays the same size, but the toe it sits on shrinks. People are used to nails and hair getting longer, not hands, feet and heads getting smaller, so they read the change as growth. [1] [2]

The BMJ article by Vreeman and Carroll makes the same point. It says the skin's retraction makes hair and nails look longer or more prominent by contrast with the shrunken tissue around them. It adds that real growth of hair and nails needs complex hormonal regulation, which is not sustained after death. [3]

The idea is old and widely repeated. Erich Maria Remarque's novel All Quiet on the Western Front, written in the 1920s, imagines a dead friend's nails growing in corkscrews after burial. Forensic anthropologist William Maples called that image powerful and disturbing but said it is pure moonshine and that no such thing occurs. The BMJ article also notes that Johnny Carson helped spread the myth with a joke about hair and fingernails growing for three days after death. [2] [3] [4]

Death is not instantaneous at the cellular level. BBC Science Focus notes that brain cells die very quickly after the heart stops, but cells that need less oxygen can survive a little longer. It suggests hair and nails could therefore grow a tiny bit for a short time. A radio science segment from Indiana Public Media is more cautious. It says some cells may keep receiving blood or tolerate low oxygen slightly longer, but these cells do not live more than a few minutes, which it describes as definitely not long enough to grow. The sources differ slightly in emphasis here, but none supports any visible growth in a body after death. [5] [6]