Ava Monroe
The human nail is a protective plate found at the tip of the digits (fingers and toes). The nail consists of the nail plate, the nail matrix, and the nail bed below it. The growing part of the nail is under the skin at the nail's proximal end under the epidermis, which is the only living part of a nail. The rate of growth of nails is related to the length of the terminal phalanges (outermost finger bones). In humans, the nail of the index finger grows faster than that of the little finger, and fingernails grow up to four times faster than toenails. The hyponychium is the thick skin under the nail tip, and it can overgrow, making nail trimming painful. This overgrowth can be caused by nail biting, gel manicures, or acrylic nails.
| Characteristics | Values |
|---|---|
| Part of the nail | Nail plate, nail matrix, nail bed, lateral nail fold, proximal nail fold |
| Nail growth | Fingernails grow at an average rate of 3.5 mm per month, while toenails grow at an average rate of 1.6 mm per month |
| Nail matrix | Active tissue that generates cells, also known as the matrix unguis, keratogenous membrane, or onychostroma |
| Hyponychium | Thick skin under the nail tip that can overgrow and become thicker, causing pain when trimming nails |
| Causes of hyponychium overgrowth | Gel manicures, acrylic nails, nail biting, nail psoriasis, and fungal infections |
| Treatment for hyponychium overgrowth | Antifungal medication, cuticle oil, and consultation with a dermatologist |
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What You'll Learn
- The hyponychium is the thick skin under the nail tip
- The hyponychium can overgrow and become thicker, making nail trimming painful
- Gel manicures, acrylic nails, nail biting, nail psoriasis, and fungal infections can cause skin overgrowth under nails
- The nail matrix is the active tissue that generates new nail cells
- The nail plate, nail matrix, nail bed, and surrounding grooves make up a nail
The hyponychium is the thick skin under the nail tip
However, the hyponychium can sometimes overgrow and become thicker, which can be painful and increase the risk of infection. This overgrowth can occur due to various factors, including gel manicures, acrylic nails, nail biting, nail psoriasis, and fungal infections. In some cases, it may be necessary to visit a dermatologist, especially if there is bleeding, discolouration, or swelling.
There are treatments available to manage hyponychium overgrowth. One option is to use a cuticle remover or cuticle oil to soften the thickened skin. It is important to gently push back the hyponychium after showering, rather than cutting the skin. For those who prefer gel manicures, switching to builder gel can add a protective layer to the nail and reduce hyponychium overgrowth.
Additionally, certain health conditions and skin diseases can affect the nail matrix, which is the tissue responsible for generating new nail cells. Peripheral artery disease, for example, can reduce blood flow to the legs and feet, slowing nail growth. Severe eczema can also interfere with nail growth, and psoriasis can cause changes to the nails, including white lines, pitting, and crumbling. It is important to consult a doctor or dermatologist to determine the underlying cause of hyponychium overgrowth and receive appropriate treatment.
Overall, the hyponychium plays a crucial role in protecting the nail unit and preventing the entry of harmful substances and pathogens. While it is generally beneficial, overgrowth can cause discomfort and increase the risk of infection, requiring appropriate management and treatment.
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The hyponychium can overgrow and become thicker, making nail trimming painful
The hyponychium is the thick skin under the nail tip, also known as the "quick". It forms a seal that protects the nail bed from germs and debris. The skin in this region contains white blood cells to prevent infection. However, the hyponychium can overgrow and become thicker, making nail trimming painful. This can be caused by several factors, including long nails, gel manicures, acrylic nails, nail biting, nail psoriasis, and fungal infections.
One of the main causes of hyponychium overgrowth is long nails. When nails are long, the hyponychium attaches to the underside of the nail as it grows. Taking a break from long nails and maintaining short nails can help prevent overgrowth. It is also recommended to avoid gel manicures and acrylic nails, as the chemicals in the gel and the procedure itself can trigger hyponychium thickening. In some cases, it may be genetic or caused by contact dermatitis or nail injury.
To treat hyponychium overgrowth, it is recommended to use cuticle oil or a cuticle remover to soften the thickened skin. Cuticle oil can be applied to the hyponychium and gently pushed back after showering. It is important to avoid cutting the hyponychium as this can introduce an infection. If the overgrowth is due to nail psoriasis or fungal infections, it is advised to see a dermatologist for a topical treatment. Nail cycling is another expert-recommended trend that can help improve nail health.
Additionally, it is important to avoid picking at the skin. If the hyponychium is bleeding, discolored, or swollen, it is recommended to visit a dermatologist. They can determine the best treatment by examining the nails and other symptoms. While nail technicians can provide cosmetic treatments, they are not medically trained to treat nail conditions. Therefore, it is crucial to consult a doctor for a proper evaluation and treatment plan.
In summary, the hyponychium can overgrow and become thicker, making nail trimming painful. This can be caused by various factors, including long nails, certain manicures, and nail-biting habits. Treatment options include softening the thickened skin with cuticle oil or remover, avoiding cutting the hyponychium, and seeking medical advice for underlying conditions such as nail psoriasis or fungal infections. It is important to prioritize the health and safety of the nail and surrounding skin to prevent further complications.
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Gel manicures, acrylic nails, nail biting, nail psoriasis, and fungal infections can cause skin overgrowth under nails
The hyponychium is the thick skin under the nail tip. It acts as a barrier to protect your nails from germs and debris. However, the hyponychium can sometimes overgrow and thicken, causing discomfort and an unsightly appearance. This condition is known as subungual hyperkeratosis. Pterygium inversum unguis (PIU) is an uncommon condition that causes the hyponychium to attach to the underside of the nail as it grows, resulting in skin overgrowth under the nail. While scientists don't fully understand PIU, it is associated with autoimmune conditions like lupus and can be present from birth or acquired later in life.
Gel manicures, acrylic nails, nail biting, nail psoriasis, and fungal infections are all possible causes of skin overgrowth under the nails. Gel manicures and acrylic nails can lead to PIU, and discontinuing these procedures typically reverses the condition. Nail biting, a common habit that often starts in childhood, can create tiny cracks in the nails or cuts in the skin, allowing bacteria to enter and cause infections. Chronic nail biting can damage the nails and surrounding skin, potentially leading to bacterial or fungal infections.
Nail psoriasis, a condition that can affect the fingernails and toenails, may cause nail changes such as crumbling, roughness, and blood under the nail. It is essential to seek treatment for nail psoriasis to prevent it from worsening and causing pain or discomfort. Treatment options include medication derived from vitamin A (tazarotene) and injections of corticosteroids or other psoriasis medications directly into or near the nails.
Fungal infections, such as onychomycosis, can thicken the nail and the skin tissue beneath it. This condition often starts in the hyponychium and spreads to the nail plate and bed. Antifungal medication, particularly systemic oral medication, is typically effective in treating fungal infections, although side effects may occur.
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The nail matrix is the active tissue that generates new nail cells
The nail matrix is a vital structure within the nail unit, responsible for generating new nail cells and contributing to the overall health and appearance of the nail. Located at the base of the nail, the nail matrix is the active tissue that forms the nail plate, also known as the germinal matrix. It produces new cells that push older, dead skin cells forward, resulting in nail growth. The nail matrix is composed of special cells that continuously create new nail cells, unlike hair follicles that undergo periods of rest.
The shape and size of the matrix directly influence the thickness and width of the nail. A larger and wider matrix corresponds to a thicker nail, while a smaller matrix leads to a thinner nail. The length of the matrix also determines the shape of nail growth, with a longer matrix creating a deeper C curve and a shorter matrix resulting in a flatter nail. The matrix is a delicate structure, and any damage to it can impact the nail's health and appearance. Injuries or trauma to the matrix can manifest as visible imperfections, such as white spots or ridges, and may weaken the nail plate, making it more prone to breakage.
The nail matrix is susceptible to various conditions and disorders that can affect its function. For example, peripheral artery disease (PAD) reduces blood flow to the legs and feet, impacting the nail matrix and slowing nail growth. Skin conditions like severe eczema and psoriasis can also interfere with nail growth, leading to changes in texture, colour, and the formation of white lines or pitting. Subungual melanoma, a type of skin cancer, can affect the nail matrix, causing brown or black discolouration.
Additionally, nail injuries and traumas, such as a broken finger or deep cut to the matrix, can temporarily halt new cell production, affecting nail growth. In some cases, trauma to the matrix may even result in permanent nail deformation or the nail's inability to grow back. Certain medications and health conditions can also influence the nail matrix and nail growth. For instance, prescription antifungal pills are commonly used to treat nail fungus, while nail psoriasis may be managed with pills, injections, or topical treatments.
The nail matrix plays a crucial role in nail formation and growth by generating new nail cells and determining the nail's thickness, width, and shape. Maintaining the health and integrity of the matrix is essential for optimal nail growth and overall nail health. Any damage or disorders affecting the matrix can have repercussions on the nail's appearance and strength.
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The nail plate, nail matrix, nail bed, and surrounding grooves make up a nail
A nail is a protective plate found at the tip of the digits (fingers and toes) of primates, corresponding to the claws in other tetrapods. The nail unit consists of the nail plate and the surrounding soft tissues. The nail plate, also known as the nail body, is the hard, outer portion of the nail unit, formed by layers of translucent keratin protein. The nail plate is strongly attached to the nail bed and does not contain any nerves or blood vessels. The nail bed is the soft tissue underneath the nail plate, attaching it to the distal phalanx. It provides a smooth surface for the growing nail plate to slide over and is highly innervated. The nail bed is an important indicator of distal tissue perfusion in individuals who may be dehydrated or in shock.
The nail matrix, also known as the matrix unguis, keratogenous membrane, or onychostroma, is the active tissue that generates new cells to form the nail plate. It is located beneath the nail plate and contains nerves, lymph, and blood vessels. The nail matrix has two parts: the germinal matrix, which generates cells, and the sterile matrix, which keeps the nail attached to the underlying skin. The lunula is the visible part of the matrix, appearing as a whitish crescent-shaped base of the nail.
The nail wall, or vallum unguis, is the cutaneous fold overlapping the sides and proximal end of the nail. The lateral margin, or margo lateralis, lies beneath the nail wall on the sides of the nail. The nail groove or fold, or sulcus matricis unguis, are the cutaneous slits into which the lateral margins are embedded. The paronychium is the soft tissue border around the nail, which overlaps onto the sides of the nail plate and is the site of hangnails, ingrown nails, and paronychia, a skin infection.
The hyponychium, informally known as the "quick", is the thickened epithelium underlying the free edge of the nail plate, located beyond the distal end of the nail bed near the fingertip. It forms a seal that protects the nail bed from germs and debris and enhances the sensitivity of the fingertip. In fair-skinned individuals, the onychodermal band, or seal between the nail plate and the hyponychium, can be seen as a glassy, greyish colour.
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Frequently asked questions
The hyponychium is the area of epithelium, or thickened portion, underlying the free edge of the nail plate. It is sometimes called the "quick". The hyponychium acts as a barrier from germs and debris, protecting the nail bed and stopping external substances from getting under the nail.
Pterygium inversum unguis (PIU) is an uncommon condition and a common cause of skin overgrowth under the fingernail. It can be present from birth or acquired later, often associated with autoimmune conditions such as lupus. Nail psoriasis and fungal infections can also cause skin cells to accumulate under the fingernails.
If you are experiencing hyponychium thickening, it is recommended to consult a doctor or dermatologist for an evaluation. Treatments can include topical corticosteroids, antifungal medication, or the application of cuticle oil to soften the thickened skin.
The root of the nail appears as a visible white crescent, known as the lunula, and extends several millimetres into the finger. The lunula is the visible part of the matrix, or nail bed, where new cells are constantly produced and pushed forward to form the nail.
