What happens to hair and fingernails after death?
It is one of the most-repeated 'facts' about death: that hair and nails go on growing in the coffin for days afterward. They don't, not by a single cell.
8 established, 1 disputed, 2 debunked, 1 unresolved. We do not pick an answer; the evidence places each claim. How we decide
22 citations from 7 independent sources - 15 echo the same voices and count once. Graded B1-D1.
Added 3 Jul 2026
What the four states mean
- Establishedsupported, uncontested
- Disputedcredible sources disagree
- Debunkedrefuted by the evidence
- Unresolvedno settled answer
Established 8supported, uncontested
What looks like growth is the corpse drying out and skin pulling back from hair and nail▰▰▰▱▱ likely2 points
Supports- BMJ: dehydration after death causes the skin and soft tissue around hair and nails to retract, creating an optical illusion of growth rather than any true lengthening.Vreeman RC, Carroll AE. Medical myths. BMJ 2007 (PMC) analysis
- Maples: skin dries and retracts, making the hair and nails appear longer; the structures themselves do not change length.Maples WR, Dead Men Do Tell Tales (1994), p. 39 (Internet Archive) primary
True growth needs living tissue, circulation, glucose and hormones, all of which stop at death▰▰▰▱▱ likely2 points
Supports- Hair and nail production depends on nutrients delivered by blood circulation; when the heart stops, the supply ceases and growth halts entirely.Digging the Dead: Mummy Myth - Hair and Nails Grow After Death analysis
- BBC Science Focus: nails and hair only appear to keep going because the flesh shrinks as it dries; the living machinery that actually builds them shuts down at death.Do fingernails and hair really keep growing after death? BBC Science Focus summary
In life nails grow only about 3.5 mm a month; the postmortem 'gain' is just exposed shaft▰▰▰▱▱ likely2 points
Supports- In healthy young adults fingernails grew 3.47 mm/month and toenails 1.62 mm/month; even days of true growth would add under a millimeter, far less than the apparent post-death change.Yaemsiri S et al. Growth rate of human fingernails and toenails. J Eur Acad Dermatol Venereol 2010 (PubMed) primary
- The apparent lengthening seen after death is typically only a few millimeters, consistent with skin retraction rather than cellular growth.Do a Person's Hair and Fingernails Continue to Grow After Death? UAMS Health summary
A leading forensic anthropologist dismissed the after-death growth claim as 'pure moonshine'▰▰▰▱▱ likely2 points
Supports- Maples (quoted in BMJ): the claim that nails and hair keep growing is 'a powerful, disturbing image, but it is pure moonshine. No such thing occurs.'Vreeman RC, Carroll AE. Medical myths. BMJ 2007 (PMC) analysis
- The line comes from Maples' own forensic memoir, where he explains the appearance is created by the skin retracting, not by any continued growth.Maples WR, Dead Men Do Tell Tales (1994), p. 39 (Internet Archive) primary
Forensic decomposition science: after death the skin desiccates, shrivels and contracts▰▰▱▱▱ likely1 source
Supports- StatPearls: as a body desiccates the skin shrivels and the body shrinks in size; in mummification the skin becomes brown, hard and brittle with a stretched appearance over prominences.Shedge R et al. Postmortem Changes. StatPearls (NCBI Bookshelf) analysis
In decomposition hair and nails actually loosen and slough off, the opposite of growth▰▰▱▱▱ likely1 source
Supports- StatPearls lists 'extrusion of hair and nails' among the external signs of putrefaction; as skin slips the hair and nails detach rather than extend.Shedge R et al. Postmortem Changes. StatPearls (NCBI Bookshelf) analysis
Death is not an instant switch: over 1,000 genes ramp up for hours to days afterward▰▰▱▱▱ likely1 source
Supports- 1,063 genes, including developmental and 38 cancer-related ones, increased in mRNA abundance up to 48-96 h after death in mice and zebrafish; the study measured transcript levels, not tissue or organ growth.Pozhitkov AE, Noble PA et al. Tracing the dynamics of gene transcripts after organismal death. Open Biology 2017 (PMC) primary
A Johnny Carson one-liner helped cement the myth in popular culture▰▰▱▱▱ likelysummary-sourced1 source
Supports- Carson's much-quoted gag: 'For three days after death hair and fingernails continue to grow but phone calls taper off' restates the false biology as a setup for the punchline.Johnny Carson quote (Goodreads) summary
Disputed 1credible sources disagree
Is post-death growth exactly zero, or a brief negligible trace? The fine point is debated▰▰▰▱▱ likely1 against3 points
Supports- BBC Science Focus caveat: because cells needing less oxygen outlast brain cells, a negligible amount of growth might theoretically occur very briefly, nothing like the sustained growth the myth claims.Do fingernails and hair really keep growing after death? BBC Science Focus summary
- Pozhitkov, Noble et al. show death is a step-wise shutdown, not an instant switch-off, so cellular machinery does not stop everywhere the moment the heart does.Pozhitkov AE, Noble PA et al. Tracing the dynamics of gene transcripts after organismal death. Open Biology 2017 (PMC) primary
Against- Forensic and medical authorities are blunt that the visible 'growth' is wholly illusion from dehydration; any residual cell activity is too small and short-lived to lengthen a hair or nail.Vreeman RC, Carroll AE. Medical myths. BMJ 2007 (PMC) analysis
Debunked 2refuted by the evidence
Hair and fingernails do not keep growing after death; the belief is a medical mythRefuted by
The BMJ's 'Medical myths' cites forensic anthropologist William Maples on the after-death growth claim: 'a powerful, disturbing image, but it is pure moonshine. No such thing occurs.'
refuted2 against3 pointsThe claim rested on- Johnny Carson's widely repeated quip states the myth as fact: for three days after death hair and fingernails continue to grow, 'but phone calls taper off.'Johnny Carson quote (Goodreads) summary
Refuted by- The BMJ's 'Medical myths' cites forensic anthropologist William Maples on the after-death growth claim: 'a powerful, disturbing image, but it is pure moonshine. No such thing occurs.'Vreeman RC, Carroll AE. Medical myths. BMJ 2007;335:1288 (PMC) analysis
- UAMS dermatology: after death, dehydration makes skin and soft tissue shrink while hair and nails stay the same length, producing only the optical illusion of growth.Do a Person's Hair and Fingernails Continue to Grow After Death? UAMS Health summary
Nails twisting into corkscrews in the grave is a literary image, not biologyRefuted by
A forensic anthropologist notes the simple test: if hair truly kept growing after death, every adult male mummy would have a full beard; none do. The skin simply retracts.
refuted2 against3 pointsThe claim rested on- In Remarque's 1929 novel the narrator stares at dying Kemmerich's hands and imagines the nails growing on 'like lean fantastic cellar-plants,' twisting into corkscrews with the hair of the decaying skull.Remarque EM, All Quiet on the Western Front, ch. 1 (Standard Ebooks) primary
Refuted by- A forensic anthropologist notes the simple test: if hair truly kept growing after death, every adult male mummy would have a full beard; none do. The skin simply retracts.Digging the Dead: Mummy Myth - Hair and Nails Grow After Death analysis
- Maples, in Dead Men Do Tell Tales, calls the underground-growth picture pure moonshine: what happens is that skin retracts around hair and nails, making them prickle up and jut out more prominently.Maples WR, Dead Men Do Tell Tales (1994), p. 39 (Internet Archive) primary
Unresolved 1no settled answer
How much skin retracts, and how fast, depends on conditions, so there is no fixed timeline▰▰▱▱▱ likely1 source
Supports- Decomposition runs through fresh, bloat, active decay, advanced decay and dry stages spanning days to over 90 days, and mummified drying needs a warm, arid environment, so the magnitude and timing of the retraction illusion vary widely.Shedge R et al. Postmortem Changes. StatPearls (NCBI Bookshelf) analysis
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