Sophia Delgado
The idea that hair and nails continue to grow after death is a pervasive myth. While it is false, the myth has a biological basis. Nails do not grow after death, as new cells cannot be produced without a supply of glucose. However, the skin around the nails becomes dehydrated and retracts, creating the illusion of longer nails. This phenomenon has been noted throughout history, from rural Slavic nations in the 1800s to literature and horror films.
| Characteristics | Values |
|---|---|
| Do fingernails grow after death? | No |
| Why does it seem like fingernails grow after death? | The skin around the nails retracts as it becomes dehydrated, making them appear longer. |
| How much can nails grow after death? | In rare cases, nails can continue to grow about 3 micrometers after death. |
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What You'll Learn
Nails do not grow after death
It is a common misconception that nails continue to grow after death. This myth is pervasive in popular culture, from Hollywood vampires to the novel All Quiet on the Western Front. However, it is simply not true that nails indefinitely grow after death. While it can be difficult for grieving families to accept, nails do not grow after an individual has passed away.
In reality, the appearance of nail growth after death is due to dehydration, which causes the skin around the nails to retract and the cuticles to expose the nail beds. This phenomenon creates the illusion of longer nails, especially if the deceased had painted or bleached their nails. Additionally, in rare cases, there may be a very small amount of nail growth after death, approximately 3 micrometers, due to some cellular functions that create keratin still occurring for a few hours after brain death. However, this amount of growth is barely visible and is not enough to be noticeable.
It is important to understand the science behind nail growth to dispel the myth of post-mortem nail growth. Nails grow by an average of 0.1 mm per day, a rate that slows down as we age. This growth is facilitated by the germinal matrix, a layer of tissue beneath the nail that produces new cells. These new cells push older ones forward, creating the appearance of lengthening nails. However, without a functioning circulatory system to supply oxygen and glucose, the cells responsible for nail growth cannot function after death.
While it may be a morbid topic, understanding that nails do not grow after death can provide some comfort. Contrary to popular belief, you will not find massive mounds of hair and grotesquely long nails in tombs or coffins. Instead, the body begins to break down, and the nails remain at the length they were at the time of death, serving as a reminder of the finality and stillness of death.
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Dehydration makes nails appear longer
It is a widely held belief that hair and nails continue to grow after death. This is a myth, and it is biologically impossible. Nails and hair are made up of cells, and their growth requires the constant production of new cells. After death, the heart stops beating and the brain is cut off from its oxygen supply. Without a constant supply of glucose, nerve cells die within three to seven minutes, and new cells cannot be produced. Therefore, it is impossible for nails to grow after death.
However, the myth is pervasive and enduring. The confusion arises from the retraction of the skin around the nails as it becomes dehydrated, creating the illusion of longer nails. This phenomenon is also observed in the hair, where the cuticles retract and expose the nail beds or hair that is yet visible above the follicle.
The circulatory system is no longer pulsing blood into the scalp or cuticles, and the flesh no longer bounces back immediately. This process is more noticeable in individuals who had painted their nails, bleached their hair, or coloured it differently from their natural colour before death.
Funeral directors sometimes moisturise the fingertips of the deceased to counteract the retraction of the skin and reduce the appearance of longer nails.
The myth of never-ending hair and nail growth after death has been perpetuated in literature and horror films, such as in Erich Maria Remarque's novel "All Quiet on the Western Front", where the young narrator imagines the nails of a friend who died of gangrene continuing to grow into corkscrews.
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Nail beds are exposed
When a person dies, their circulatory system stops functioning, leading to dehydration of the body. This dehydration causes the skin around the nails to retract, exposing the nail beds. The cuticles, which protect the nail beds, also retract due to the lack of blood flow. As a result, the nail beds become visible, creating the illusion of nail growth.
The phenomenon of exposed nail beds is often associated with the misconception that nails continue to grow after death. This misconception has persisted for centuries and has been popularized in literature and horror films. However, it is important to understand that nail growth requires the production of new cells, which is dependent on glucose. After death, the body's ability to produce glucose ceases, preventing any possibility of nail growth.
The exposure of nail beds is a natural occurrence during the postmortem period. The dehydration of the body causes the skin to retract, which is more noticeable in the areas surrounding the nails. This retraction can make the nails appear longer, even though the nails themselves have not grown.
Funeral directors often employ strategies to mitigate the appearance of exposed nail beds. One common practice is to moisturize the fingertips, which helps to counteract the dehydration and resulting retraction of the skin. By moisturizing the skin, the nail beds can be partially covered, reducing the visual impact of the exposed nails.
While the exposure of nail beds may be unsettling, it is an expected occurrence after death. The retraction of the skin and cuticles is a natural consequence of the body's dehydration, and it is important to understand that nail growth does not continue postmortem. Understanding the scientific explanation behind the exposure of nail beds can help dispel myths and provide clarity during a time of grief.
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Some cellular functions continue for a few hours
It is a common misconception that hair and nails continue to grow after death. While this is not true, the origin of this myth can be explained by the biological process of dehydration. When a person dies, their circulatory system stops functioning, and as a result, the body becomes dehydrated. This dehydration causes the skin around the nails to retract, exposing the nail beds and making the nails appear longer. Similarly, the skin on the chin dries out and pulls back, making any stubble appear more prominent.
However, it is important to note that some cellular functions that create keratin can continue for a few hours after brain death. This occurs because, even though the brain has stopped functioning, these cells can still utilize the remaining glucose in the body to carry out their functions. This can lead to a very small amount of growth, approximately 3 micrometers, which is barely visible. To put this into perspective, one human hair is about 100 micrometers wide, so the growth of nails or hair after death would be negligible, at most 1/33rd the width of a hair.
This phenomenon of cellular functions continuing for a short time after death is not unique to nails and hair. For example, nerve cells can survive for up to seven minutes after the oxygen supply to the brain is cut off, while skin cells can remain viable for up to 12 hours, allowing for successful skin grafts. Transplant surgeons are experienced in calculating the timeframe during which different types of cells remain functional after death, ensuring that donated organs are harvested and transplanted within the appropriate time frames.
While it is true that some cellular functions can continue for a short period after death, it is important to clarify that this does not result in significant nail or hair growth. The appearance of growth is primarily due to dehydration and retraction of the skin, rather than the generation of new cells, which is necessary for actual growth to occur. This retraction of the skin can be mitigated by funeral directors who may moisturize the fingertips and other affected areas.
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The myth is pervasive
The belief that hair and nails grow after death is not a new one. In the 1800s, stories of mythical vampires with long hair and nails scratching at their caskets fuelled fears of growing nails and hair post-mortem. This image of the undead has persisted and evolved, with modern-day vampires in films like "Dracula" continuing to portray these characteristics.
The myth is also perpetuated by emotional grieving families who believe they see new growth of hair or nails on a deceased loved one. This can be explained by the retraction of the skin and cuticles due to dehydration, creating the illusion of growth. Additionally, some cellular functions that create keratin can continue for a few hours after death, resulting in minimal growth that is barely visible.
The image of growing hair and nails in coffins is not a pleasant one, and thankfully, it is not based on reality. While it is true that fingernails grow by an average of 0.1mm per day in living people, this growth requires the production of new cells, which cannot occur without glucose—something that is cut off from the brain within minutes of death.
Despite the persistence of this pervasive myth, it is important to know that hair and nails do not grow indefinitely after death.
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Frequently asked questions
No, your finger nails do not grow indefinitely after you die. Your hair and nails completely stop growing after you die. In rare cases, your hair and nails can continue to grow about 3 micrometers after death, which is barely visible.
The myth that hair and nails continue to grow after death can be attributed to a halted circulatory system and resultant dehydration. The circulatory system is no longer pulsing blood into the cuticles, so the cuticles retract and expose nail beds, creating an illusion of growing nails, especially if the decedent had painted their nails or if they had very different coloured hair.
Nails require new cells to be produced to grow and this can’t happen without glucose. With no heartbeat after death, the oxygen supply to the brain is cut off and with no glucose store to rely on, nerve cells die within three to seven minutes.
