Liam Carter
The skin that grows over the nail is called the hyponychium. It is the tissue under the free edge of the nail and acts as a barrier from germs and debris, protecting the nail from harmful substances. While it is generally good, the hyponychium can sometimes overgrow, leading to discomfort and an increased risk of infection. Pterygium inversum unguis (PIU) is an uncommon condition that causes the hyponychium to attach to the underside of the nail as it grows. Other causes of skin overgrowth under the nail include psoriasis, eczema, and long-term stress.
| Characteristics | Values |
|---|---|
| Skin that grows over the nail | Hyponychium |
| Location | Under the free edge of the nail, beyond the distal end of the nail bed, near the fingertip |
| Function | Acts as a barrier from germs and debris, preventing them from getting under the nails |
| Composition | Contains white blood cells to prevent infection |
| Overgrowth | Can be caused by long nails, gel or acrylic nails, contact dermatitis, nail injury, lupus, psoriasis, or eczema |
| Treatment | Consult a dermatologist or doctor for evaluation and treatment options; avoid cutting the hyponychium to prevent infection |
| Related Conditions | Pterygium inversum unguis (PIU), onycholysis, retronychia, paronychia |
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What You'll Learn
- The hyponychium is the skin under the free edge of the nail
- Pterygium inversum unguis (PIU) is an uncommon cause of skin overgrowth
- Stress and health conditions can cause cuticles to overgrow
- Eczema and psoriasis can cause skin overgrowth near cuticles
- Chronic retronychia is diagnosed by appearance and nail plate layers
The hyponychium is the skin under the free edge of the nail
The hyponychium is a strong seal that attaches to the underside of the nail as it grows. This protective seal is formed together with the onychodermal band. The presence of nerve endings within the hyponychium acts as an alert system. When the seal is compromised, these nerve endings send signals that cause discomfort or pain, warning of potential damage or infection.
The hyponychium can sometimes overgrow and become thicker, which can be uncomfortable and make trimming nails painful. This overgrowth can occur due to various reasons, including wearing long gel or acrylic nails, contact dermatitis, nail injury, or genetic factors. In some cases, it may be associated with certain health conditions, such as psoriasis or lupus.
To address hyponychium overgrowth, it is recommended to consult a doctor instead of a nail technician. Treatment options may include avoiding certain manicures, using corticosteroids, antifungal medication, or cuticle oil to soften the thickened skin.
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Pterygium inversum unguis (PIU) is an uncommon cause of skin overgrowth
The skin that grows over the nail is called the hyponychium. It is the thick skin under the nail tip that acts as a barrier from germs and debris. This skin contains white blood cells to help prevent infection. However, sometimes the hyponychium can overgrow and become thicker, making it painful to trim nails.
One common cause of hyponychium overgrowth is Pterygium inversum unguis (PIU), an uncommon condition where the hyponychium attaches to the underside of the nail as it grows. It is characterised by the abnormal adherence of the hyponychium to the ventral surface of the nail plate, which can be both unsightly and painful for patients. While scientists don't fully understand PIU, they know it can be present from birth or acquired later. The acquired form is often associated with autoimmune conditions such as lupus and psoriasis, as well as external factors like gel manicures, wearing acrylic nails, or nail biting.
PIU is a rare nail abnormality, and its exact origin remains speculative. It has been reported in only a few patients, with very few cases of congenital PIU. The disorder does not seem to be familial, and it can arise spontaneously and gradually, affecting several symmetrical fingers. There are no nail plate alterations, and the soft periunguinal tissues remain normal.
In addition to PIU, there are several other possible reasons for hyponychium overgrowth. These include chronic stress, which causes the body to release more cortisol, a stress hormone that can affect the nails. Other potential causes include contact dermatitis, nail injuries, and certain health conditions.
If you are concerned about skin overgrowth under your nails, it is recommended to consult a dermatologist instead of a nail technician. They can determine the best treatment by examining your nails and other symptoms.
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Stress and health conditions can cause cuticles to overgrow
The skin that grows over the nail is called the hyponychium. It is the tissue under the free edge of the nail that acts as a barrier to protect your nails from infection. While the hyponychium is generally good, it can become a problem if it overgrows, making nail trimming painful and increasing the chances of infection.
Similarly, the cuticle, a thin layer of dead skin that grows around the edge of your toenails and fingernails, provides the same protective function. Cuticle overgrowth is usually not a cause for concern, but unmanaged overgrowth can lead to other issues.
Certain vitamins and supplements marketed for improved nail growth can also cause cuticles to grow faster than normal. Dr Camp notes that stress may prompt some people to pick at their cuticles, which can predispose the skin to infection or inflammation.
Health conditions such as psoriasis, a skin condition characterised by rapid skin cell multiplication, can also cause cuticle overgrowth. When psoriasis affects the nails, an overgrowth of cuticles can occur, gradually covering parts of the nail if left untreated. Eczema, an inflammatory skin condition, can also trigger overgrown cuticles. When eczema forms near the cuticles, excess scratching or rubbing can cause the skin to overgrow. Allergic contact dermatitis, an immune response triggered by external factors, can also cause cuticle overgrowth.
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Eczema and psoriasis can cause skin overgrowth near cuticles
A cuticle is a thin layer of dead skin that grows around the edge of your toenails and fingernails. It acts as a protective barrier to prevent bacteria, dirt, and fungus from getting beneath your nail and causing an infection. Cuticle overgrowth is usually harmless and mostly a cosmetic concern. However, in some cases, unmanaged overgrowth can lead to other issues.
Eczema and psoriasis are two skin conditions that can cause cuticle overgrowth. Eczema is an inflammatory skin condition characterised by itching and dry, scaly skin. When eczema develops near the cuticles, excessive scratching or rubbing can lead to skin overgrowth. Pompholyx eczema, a specific type of eczema, can affect the nail folds and skin around the nails (cuticles), resulting in swelling. Nail eczema can also cause pitting, grooving, and thinning of the nails.
Psoriasis is a chronic skin condition that affects the growth of skin and nails. It is characterised by rapid skin cell growth, which can lead to scaling and buildup. When psoriasis affects the nails, it can result in cuticle overgrowth, pitting of the nail plate, onycholysis (separation of the nail plate from the nail bed), and small areas of discolouration.
To manage cuticle overgrowth due to eczema or psoriasis, it is important to practice good cuticle care. This includes gently pushing back the cuticles with a cuticle stick, avoiding cutting or removing them, and keeping them well-hydrated with oils or lotions. In the case of eczema, treatment may also involve lifestyle changes and topical medications. For psoriasis, management may involve addressing the underlying skin condition.
While cuticle overgrowth is usually harmless, it is important to seek medical attention if the area becomes swollen, puffy, and red, as it may indicate an infection. Additionally, if the cuticles become severely dry or cracked, there is an increased risk of bacterial or fungal infections, and medical attention should be sought.
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Chronic retronychia is diagnosed by appearance and nail plate layers
The skin that grows over the nail is called the hyponychium. It is the tissue under the free edge of the nail that seals the nail plate to the tip of the finger. It acts as a barrier from germs and debris, preventing them from getting under the nails.
Retronychia is a less common form of paronychia, which is an infection of the periungual tissues. Chronic retronychia is diagnosed by its appearance, including the layers of stacked nail plates and the missing cuticle. In the chronic stage, the inflammation resolves, but the nail plate becomes thickened and separates from the nail bed (a condition called onycholysis). The cuticle is absent, and there is little to no debris under the nail. The tissues around the nail may also be swollen, red, and tender.
Chronic retronychia is diagnosed by its appearance, specifically the layers of stacked nail plates. This condition is characterized by onycholysis, where the proximal nail plate becomes embedded into the proximal nail fold, resulting in the loss of the normal alignment of the nail matrix and nail plate. The growth of new nails pushes the old nail upwards, leading to the stacking of multiple generations of nail plates.
The diagnosis of retronychia is clinical, and treatment varies depending on the stage of the condition. In the acute stage, treatment options include topical and intralesional corticosteroids. In the chronic stage, treatment may involve nail removal. It is important to avoid microtrauma, such as wearing shoes with more space around the toes to relieve pressure on the affected toenail.
Various factors can contribute to the development of retronychia. It is often associated with repetitive microtrauma to the nail, such as wearing tight shoes or engaging in activities that lead to toenail trauma. Additionally, underlying health conditions, such as psoriasis and eczema, may also play a role in nail changes and cuticle overgrowth. Stress has also been implicated as a possible factor, although the exact link between systemic issues and overgrown cuticles is not yet fully understood.
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Frequently asked questions
The skin that grows over the nail is called the hyponychium. It is located near the fingertip, at the free edge of the nail, and acts as a barrier from germs and debris.
There are several reasons why the hyponychium may thicken. One possible cause is long-term stress, which affects the skin, hair, and nails. Other causes include injury, wearing long gel or acrylic nails, contact dermatitis, or autoimmune conditions such as lupus.
It is not recommended to cut the hyponychium as this can introduce infection. Instead, see a dermatologist, who can examine your nails and determine the best treatment. Treatment options may include corticosteroids applied to or injected into the nail, or, in the case of chronic retronychia, removal of the nail.
Yes, skin conditions such as psoriasis, eczema, and paronychia can cause the skin around the nails to thicken. Psoriasis involves the overgrowth of skin cells, which can affect the hyponychium and nail bed. Eczema can develop near the cuticles, and excess scratching can lead to overgrowth. Paronychia refers to redness and swelling around the nail, which can be treated with soaks and antibiotics.
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