Sophia Delgado
It is a common misconception that hair and nails continue to grow after death. This belief has been perpetuated by popular culture, such as the book All Quiet on the Western Front, which describes a dead soldier's nails growing into corkscrews. However, scientifically speaking, hair and nails do not grow after death. The moment a person dies, their body starts to dehydrate, causing the skin around the nails and hair to retract and expose the parts of the nails and hair that were previously under the skin. This creates the illusion of growth, but in reality, the hair and nails have not lengthened.
| Characteristics | Values |
|---|---|
| Do hair and nails grow after death? | No |
| Why does hair and nail growth after death remain a popular belief? | Dehydration causes the skin to retract, creating the illusion of hair and nail growth |
| How does dehydration cause the illusion of hair and nail growth? | The cuticles retract and expose nail beds or hair that was not visible earlier. The skin around the nails retracts, making the nails appear longer. |
| What is the biological basis for this belief? | Some cellular functions that create keratin still occur for a few hours after the brain dies until those cells run out of glucose |
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What You'll Learn
Hair and nails do not grow after death
Hair and nails are made up of cells that divide to produce new cells, causing hair and nails to grow. This process requires energy, which is created by the burning of glucose. When a person dies, their heart stops pumping oxygen-rich blood around their body, cutting off the energy supply and causing cell division to cease. Therefore, hair and nails do not grow after death.
However, it is common for grieving families to believe they see new hair or nail growth on a dead body. This is because, after death, the body becomes dehydrated, causing the skin on the head and around the nails to retract and expose the hair and nails. This creates the illusion of growth, as the hair and nails remain the same length while more of them are exposed.
This phenomenon has been noted to have inspired old tales of vampirism in Europe, where fictional vampires were often depicted with long hair and nails. It has also been referenced in popular culture, such as in Erich Maria Remarque's novel, "All Quiet on the Western Front," where the protagonist imagines his dead friend's nails growing in corkscrews.
While hair and nails may appear longer after death due to dehydration and retraction of the skin, it is important to note that there is no material or hormonal activity to induce actual growth. This myth can be attributed to the optical illusion created by the body's natural decomposition process.
In rare cases, hair and nails can continue to grow by a very small amount of about 3 micrometers after death. This minimal growth is barely visible and is not enough to be noticeable unless there is a significant contrast between the new growth and the existing hair or nails, such as dark roots below brightly bleached hair.
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Decomposition creates an illusion of growth
Decomposition creates an illusion of hair and nail growth on a dead body. The moment a person dies, their body starts to decompose, and the cells begin to die due to a lack of glucose. The circulatory system stops pulsing blood into the scalp or cuticles, and the cuticles retract and expose nail beds or hair that was previously not visible. This phenomenon creates an illusion of hair and nail growth.
This illusion is further exacerbated by the dehydration of the body, which causes the skin on the head and around the nails to dry up and retract, making the hair and nails appear longer. This process is known as livor mortis. The retraction of the skin can make the hair and nails appear up to 1/33rd of their original width longer, which can be especially noticeable if the person had dark roots or painted their nails before death.
While it is true that some cellular functions that create keratin can continue for a few hours after brain death, this growth is minimal and not enough to be noticeable. On average, fingernails grow about 0.1 mm per day, and this growth requires a constant supply of glucose, which is cut off after death. Similarly, hair growth is driven by the division of cells in the hair matrix, which requires energy from the burning of glucose. Once the heart stops pumping oxygen and nutrients around the body, the energy supply is cut off, and cell division that drives hair growth ceases.
The illusion of hair and nail growth after death has been perpetuated throughout history and popular culture, from old tales of vampirism in Europe to Erich Maria Remarque's novel "All Quiet on the Western Front," where the protagonist imagines his dead friend's nails growing in corkscrews. However, it is important to note that this is just an illusion, and hair and nails do not continue to grow after death.
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Dehydration causes the skin to retract
Dehydration occurs when the body loses more water than it takes in. It can be caused by various factors, such as not drinking enough water, increased urination due to caffeine or diuretics, or excessive sweating from exercise. Dehydration can affect all parts of the body, including the skin.
Dehydrated skin is a condition where the skin lacks water. It can cause the skin to become dry, itchy, and dull in complexion, with more noticeable fine lines. Dehydrated skin can also affect the skin's elasticity, making it less stretchy and resilient. This reduced elasticity is known as poor skin turgor, which is a common sign of dehydration.
When a person dies, their body undergoes dehydration as part of the decomposition process. The circulatory system ceases to function, and the skin begins to dry out and retract. Specifically, the skin on the head and around the nails pulls away, creating the illusion of hair and nail growth. This phenomenon is often observed by grieving families, who may find it difficult to accept the reality of their loved one's death.
To address dehydrated skin in a living person, it is crucial to focus on rehydration and lifestyle changes. Increasing water intake is essential, and sports drinks with electrolytes can also be beneficial. Additionally, limiting caffeine and alcohol intake, regular exercise, and a diet rich in water-based vegetables and fruits can help improve skin hydration.
In summary, dehydration can cause the skin to retract, leading to reduced elasticity and a dull, dry appearance. This process is particularly evident in deceased individuals, where dehydration during decomposition creates the illusion of hair and nail growth.
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Cells die within 3-7 minutes after death
It is a common misconception that hair and nails continue to grow after death. This is a myth that has persisted for centuries, with stories of vampires in the 1800s and tales from rural Slavic nations, both of which feature growing hair and nails. However, this belief is not based on scientific fact.
When a person dies, their body stops producing new cells, which is necessary for hair and nail growth. Specifically, nerve cells die within 3 to 7 minutes after death due to a lack of oxygen, which halts the production of new cells. Without oxygen, the body's organs and cells begin to break down, with certain tissues dying off faster than others. This process is known as apoptosis or programmed cell death, which is necessary for clearing unnecessary or harmful cells from the body.
The appearance of hair and nail growth after death can be attributed to the dehydration of the body, which causes the skin around the nails and scalp to retract and expose more of the hair and nail bed. This creates the illusion of growth, but the hair and nails themselves are not actually growing. In rare cases, hair and nails can continue to grow by a very small amount, about 3 micrometers, after death due to some residual cellular functions that create keratin. However, this amount of growth is barely visible and is not enough to be noticeable.
Transplant surgeons and medical examiners are experienced in understanding the changes that occur in the body after death, including the cessation of cell production and growth. This knowledge is crucial for determining the timeline of events and circumstances surrounding a person's death.
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Funeral directors moisturise fingertips to reduce the illusion
The circulatory system no longer pumps blood to the scalp or cuticles, so the cuticles retract and expose the nail beds or hair that is yet to become visible above the follicle. This phenomenon creates the illusion of growth, especially if the deceased had painted their nails or coloured their hair.
Funeral directors may use moisturiser to counteract the drying of the skin, and therefore the appearance of longer nails and hair. This is part of the preparation of the body, which also includes mortuary makeup.
Mortuary makeup is used to prepare the deceased for their final moments with their loved ones. It is referred to as 'restorative arts' in the industry, defined as "the care of the deceased to recreate natural form and colour". Some funeral directors prefer to use over-the-counter cosmetics, while others use makeup from the deceased's own collection.
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Frequently asked questions
No, hair stops growing after death. The cells that drive hair growth require energy from the burning of glucose, which requires oxygen. Once the heart stops pumping oxygen around the body, the energy supply dries up, and so does the cell division that drives hair growth.
No, fingernails also stop growing after death. In order for fingernails to grow, new cells need to be produced, but this can't happen without glucose.
After death, dehydration causes the skin on the head and around the nails to dry up and retract, making hair and nails appear longer and, therefore, as if they are growing.
The appearance of new hair or nails is almost certainly linked to old tales of vampirism in Europe. In popular culture, this myth has persisted, with references in books and jokes.
In rare cases, hair and nails can continue to grow about 3 micrometers after death. That is a very tiny amount of growth — barely visible.
