Isla Bennett
The layer under your nail is called the hyponychium, and it is located at the distal end of your nail bed. It is an area of epithelium, or thickened skin, that acts as a barrier to protect your nail bed from germs and debris. In some cases, the hyponychium can overgrow, leading to skin overgrowth under the fingernail. This condition is known as Pterygium inversum unguis (PIU) and can be caused by autoimmune conditions such as lupus or external factors like psoriasis. Onycholysis, or nail separation from the nail bed, can also occur due to various factors, including injuries, fungal infections, and chemical exposure. While there is no cure for onycholysis, proper nail care and treatment of the underlying cause can promote new nail growth.
| Characteristics | Values |
|---|---|
| What is the layer under your nail called? | Hyponychium, also known as the "quick" |
| What is its function? | Acts as a barrier from germs and debris |
| What does it contain? | White blood cells to prevent infection |
| What happens when it overgrows? | It can cause trimming pain and increase the risk of infection |
| What causes overgrowth? | Pterygium inversum unguis (PIU), Psoriasis, and other autoimmune conditions |
| What happens when the nail separates from the nail bed? | This condition is called onycholysis, and it can be caused by injuries, fungal infections, or psoriasis |
| How long does it take for nails to regrow? | Fingernails take 4 to 6 months, while toenails can take 8 to 18 months |
Explore related products
What You'll Learn
- The hyponychium, or quick, is the thickened skin under the nail plate
- Pterygium inversum unguis (PIU) is an uncommon condition causing skin overgrowth under the nail
- Onycholysis is a condition where the nail separates from the nail bed
- The nail matrix is where your fingernails or toenails form
- Illnesses, injuries, and medications can affect nail growth
The hyponychium, or quick, is the thickened skin under the nail plate
The hyponychium is the thickened skin under the nail plate, located at the distal edge of the finger, beneath the free edge of the nail plate. It is also known as the "quick". This structure forms a tight seal, acting as a barrier to prevent harmful bacteria, germs, allergens, and pathogens from entering the delicate areas of the nail, such as the nail bed and matrix. The presence of nerve endings within the hyponychium serves as an alert system, sending signals of discomfort or pain when the protective seal is compromised, warning of potential damage or infection.
While the hyponychium typically protects the nail from harmful substances, it can become problematic if it overgrows. This overgrowth can occur due to various factors, including gel manicures, acrylic nails, nail biting, nail psoriasis, and fungal infections. Overgrown hyponychium can cause pain and increase the risk of infection. Treatment options include antifungal medication, cuticle oil, and cuticle remover to soften and reduce the thickened skin.
Pterygium inversum unguis (PIU) is an uncommon condition characterised by the attachment of the hyponychium to the underside of the nail during growth, resulting in skin overgrowth under the fingernail. It can be present from birth or acquired, with the latter often associated with autoimmune conditions such as lupus or triggered by external factors.
Maintaining good nail hygiene is crucial for the hyponychium's integrity. Regular cleaning of the nail area helps keep it free from dirt and debris, preventing infections and maintaining the overall health of the nail unit.
Grow Nails Fast: Overnight Nail Care Tips
You may want to see also
Explore related products
Pterygium inversum unguis (PIU) is an uncommon condition causing skin overgrowth under the nail
The hyponychium is the skin just under the free edge of the nail. It acts as a barrier to protect the nail from germs and debris. However, the hyponychium can sometimes overgrow and thicken, which can cause pain and increase the risk of infection. This condition is known as Pterygium inversum unguis (PIU).
PIU is an uncommon condition where the hyponychium attaches to the underside of the nail as it grows, causing skin overgrowth under the nail. It was first described in 1973 and has been reported in a few patients since then. The condition can be congenital or acquired, with or without a family history. The acquired form is most commonly associated with autoimmune conditions such as lupus, but can also be triggered by external factors such as psoriasis, a skin condition where skin cells grow too quickly.
The exact origin of PIU is unknown, and management of the condition is not well-defined. While keratolytics, topical steroids, and surgical excision with electrocautery have been reported as ineffective treatments, addressing the underlying cause of PIU is considered the most effective strategy. Patients with PIU need to be evaluated for associated rheumatologic diseases and require long-term follow-up examinations to detect the development of connective tissue diseases.
PIU can cause pain, discomfort, and bleeding when nails are clipped. It may affect a single finger or multiple fingers, and it occurs more frequently in females. About 50% of cases are concurrent with collagen diseases such as systemic lupus erythematosus and scleroderma.
Grow Thumb Nails Faster: Effective Tips and Tricks
You may want to see also
Explore related products
Onycholysis is a condition where the nail separates from the nail bed
The hyponychium is the skin just under the free edge of the nail. It acts as a barrier to protect the nail from germs and debris. However, the hyponychium can sometimes overgrow, causing the skin to thicken underneath the nail. This condition is known as Pterygium inversum unguis (PIU), an uncommon but common cause of skin overgrowth under the fingernail.
Onycholysis is a condition characterised by the detachment of the nail from the nail bed. It usually starts at the tip and/or sides of the nail, and is often painless. The nail may appear white and opaque, and the distal part of the nail is most commonly affected. Onycholysis can be caused by various factors, including injuries, fungal infections, and reactions to chemicals in nail products. It can also be associated with certain medical conditions such as psoriasis, hyperthyroidism, and peripheral artery disease.
The treatment for onycholysis aims to keep new nail growth attached to the nail bed. This involves trimming the affected nail short and avoiding activities that can traumatise the nail or cause irritation, such as biting nails or using certain nail care products. Antifungal medications may also be prescribed if a fungal infection is present. While the detached portion of the nail will not reattach, the condition can be managed, and the nail will slowly regrow over several months.
To prevent onycholysis, it is recommended to keep nails trimmed short, avoid biting nails, and be cautious when cleaning underneath the nails. Avoiding irritants such as nail polish, nail gloss, and nail hardeners can also help reduce the risk of developing onycholysis.
Toe Nail Growth: Where Does it Originate?
You may want to see also
Explore related products
The nail matrix is where your fingernails or toenails form
The nail matrix is the area where your fingernails and toenails are formed. It is located at the base of the nail and consists of two parts: the germinal matrix and the sterile matrix. The nail matrix is made up of special cells that create new cells, pushing out old, dead skin cells to make your nails. Each nail matrix produces 196 layers of cells that combine to form each of your fingernails and toenails.
The germinal matrix, which is responsible for about 90% of nail growth, is found under the base of the nail. The sterile matrix, which accounts for the remaining 10% of cells, lies underneath the nail and plays a crucial role in keeping the nail attached to the underlying skin. The lunula, the white crescent shape at the base of your nail, is the only visible part of the nail matrix, although some people do not have visible lunulas.
Injuries and certain health conditions can damage the nail matrix, affecting nail growth. Minor damage to the nail matrix may cause temporary changes in the nail's appearance, such as bruising, ridges, or discolouration. Severe injuries could result in the nail falling off, and in some cases, it may not grow back. Proper care is essential for the healing of the nail matrix, and treatment can help restore nail growth.
Various factors can affect the nail matrix, including fungal infections, certain medications, and skin conditions. For example, toenail fungus may manifest as thick, yellow, cracked, or cloudy nails. Chemotherapy and other medications may cause Beau's lines (horizontal ridges) or slow nail growth. Additionally, severe eczema can interfere with nail growth, leading to Beau's lines, pitting, and texture or colour changes.
The Secret to Growing Perfect Oval Nails
You may want to see also
Explore related products
Illnesses, injuries, and medications can affect nail growth
Illnesses, injuries, and medications can all impact nail growth and health.
Illnesses
Serious health events, such as a heart attack, or illnesses like COVID-19 or pneumonia, can interrupt nail growth and cause Beau's lines (horizontal ridges on nails). Iron deficiency can also cause nails to become brittle and break easily. Additionally, underlying illnesses can cause nail abnormalities, such as spots, discolouration, and nail separation. Yellow nail syndrome, for example, causes nails to thicken and grow slower than normal.
Injuries
Injuries to the nail matrix, such as pinching or crushing the finger, can result in bruising, ridges, or discolouration. The nail may even fall off. In some cases, injuries can cause nail infections or onycholysis, a condition where the nail separates from its nail bed. This can be treated by cutting away the separated nail or taking antifungal medication. To relieve nail injuries, a procedure called nail trephination can be performed to drain trapped blood, relieve pain, and promote proper nail growth.
Medications
Certain medications can also affect nail growth and appearance. Chemotherapy, for instance, can cause Beau's lines or slow nail growth. Other medications may lead to Mees' lines (white bands across nails) and nail colour changes. These changes typically disappear once the medication is stopped. Antifungal medications are also used to treat thick skin under the nail caused by fungal infections.
While nail abnormalities can be distressing, proper nail care and medical treatment can help restore nail health and growth.
The Mystery Behind Flat Nail Growth
You may want to see also
Frequently asked questions
The hyponychium is the area of epithelium, particularly the thickened portion, underlying the free edge of the nail plate. It is sometimes called the "quick", and it acts as a barrier from germs and debris to stop external substances from getting under your nails.
Pterygium inversum unguis (PIU) is a common cause of skin overgrowth under the fingernail. It occurs when the hyponychium attaches to the underside of the nail as it grows. Other causes include fungal infections, psoriasis, and lupus.
Onycholysis, or nail separation, is when your nail separates from its nail bed. It is often caused by injury, fungus, or psoriasis. Treatment may involve cutting away the separated nail as it grows out, taking antifungal medication, or stopping the use of certain nail products.
