Skin Over Nails: What To Do?

when skin grow over nail

Changes in the appearance of your nails can be harmless, but they can also be a sign of disease. Skin growing over the nail is known as Pterygium inversum unguis (PIU) or overgrown cuticles. This can be caused by poor nail care, long-term stress, or health conditions such as psoriasis, eczema, or fungal infections. Treatment options include cuticle oil, cuticle remover, and in more severe cases, surgery. If you are unsure about the cause of skin growing over your nails, it is recommended to consult a dermatologist.

Characteristics Values
Name of the condition Pterygium inversum unguis (PIU) or Overgrown Toeskin
Part of the nail affected Hyponychium (the skin just under the free edge of the nail)
Causes Genetic, wearing long nails with gel or acrylic, contact dermatitis, nail injury, psoriasis, eczema, lupus, autoimmune conditions, fungal infections, etc.
Treatment Cuticle oil or remover, nail cycling, Vandenbos Surgery
Symptoms Pain, discomfort, increased chance of infection

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Pterygium inversum unguis (PIU)

PIU was first described in 1973, and its exact origin is still unknown. The management of PIU is also not well-defined, and various treatments, including keratolytics, topical steroids, and surgical excision with electrocautery, have been reported as ineffective. Treating the underlying cause of PIU is the most effective strategy, and patients require long-term follow-up examinations to detect the development of connective tissue diseases.

The hyponychium is the skin just under the free edge of the nail, located near the fingertip. It acts as a barrier to protect the nail from germs and debris and contains white blood cells to prevent infection. However, the overgrowth of the hyponychium can cause discomfort and increase the risk of infection. This overgrowth can be triggered by various factors, including long nails, gel or acrylic nails, contact dermatitis, and nail injury.

To manage hyponychium overgrowth, it is recommended to maintain short nails and use cuticle oil or a cuticle remover to soften the thickened skin. If the overgrowth is caused by nail psoriasis or fungal infections, it is advised to consult a dermatologist for topical treatment. It is important to consult a doctor instead of a nail technician for proper medical treatment.

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Psoriasis

Nail psoriasis is a common presentation of the condition, affecting around 40-50% of people with psoriasis. It can cause changes in the colour, texture, and structure of the nails. The nails may turn white, yellow, red, pink, or brown, and small spots may appear underneath. Nails may develop ridges, grooves (Beau's lines), or pits on the surface, and chalky material may gather under the nail, causing it to lift away from the skin. The nails can become thickened, brittle, and prone to breaking. In some cases, the nail may loosen or separate from the nail bed (onycholysis), leading to nail fungus.

The treatment for nail psoriasis aims to address the underlying psoriasis and reduce symptoms. Topical medications, such as corticosteroids, vitamin D derivatives, and retinoids, are applied directly to the nails and cuticles to reduce inflammation, slow skin cell production, and improve nail thickness. Oral medications, such as methotrexate and cyclosporine, may be prescribed in more severe cases. Phototherapy, using ultraviolet light, is another treatment option.

It is important to note that nail psoriasis is not contagious and is not caused by a fungal infection. However, having psoriasis increases the risk of developing a fungal nail infection due to nail damage and weakened immune defences. Therefore, distinguishing between nail psoriasis and nail fungus is crucial for effective treatment.

Good nail care practices, including keeping nails trimmed, filing nail edges, moisturising, and wearing protective gloves and comfortable shoes, can help manage nail psoriasis.

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Poor nail care

One common issue related to poor nail care is brittle nails, which can be caused by a poor diet, hypothyroidism, or iron deficiency. Weak nails can also be a result of overexposure to moisture or chemicals such as detergents, cleaning fluids, nail treatments, and nail polish. To address this, it is recommended to avoid chemicals and opt for natural alternatives, as well as improve dietary intake by consuming whole foods or taking multivitamins.

Another issue that may arise from poor nail care is nail psoriasis, a skin condition where skin cells grow rapidly and affect the nails, causing scaling and buildup. This overgrowth is known as subungual hyperkeratosis and can lead to onycholysis, or the separation of the nail plate from the nail bed. It is recommended to consult a dermatologist for topical treatments in such cases.

Additionally, poor nail care habits can contribute to the overgrowth of the hyponychium, the skin located under the free edge of the nail near the fingertip. This overgrowth can make trimming nails difficult and painful, affecting the appearance of the nails. To manage this condition, it is recommended to take breaks from long nails and maintain shorter nails. Using cuticle oil or a cuticle remover can help soften the thickened skin, and in case of persistent issues, consulting a dermatologist is advised.

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Ingrown toenails

  • Trimming toenails too short, especially on the sides of the big toes.
  • Tapering or rounding the corners of the toenails when trimming.
  • Wearing tight or ill-fitting shoes that place pressure on the toes.
  • Trauma to the toe, such as stubbing or banging the toe.
  • Poor blood circulation in the foot.
  • Nail infections.

To prevent ingrown toenails, it is recommended to:

  • Trim toenails straight across without tapering or rounding the corners.
  • Avoid cutting toenails too short, ensuring they are even with the tips of the toes.
  • Wear properly fitting shoes and socks that provide adequate room for the toes.
  • Keep the feet clean and dry, except when bathing or performing water activities.

If you experience an ingrown toenail, it is important to monitor for signs of infection, such as redness, swelling, pain, and discharge. Mild cases can often be treated at home by soaking the affected foot in warm water several times a day and keeping it dry otherwise. However, if the condition is severe or does not improve, it is recommended to seek medical attention. In some cases, oral antibiotics or surgical removal of part or all of the affected toenail may be necessary.

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Onycholysis

The disorder can be primary (idiopathic, or of unknown cause) or secondary to another condition. Secondary onycholysis can be caused by trauma, skin disease, nail infections, tumours, or systemic events. For example, it can occur in people with psoriasis, hyperthyroidism, hypothyroidism, reactive arthritis, or porphyria cutanea tarda. It has also been linked to reactions to detergents, such as washing dishes with bare hands or using detergent-based shampoos and soaps. In some cases, onycholysis may be caused by a reaction to medication.

The nail surface in onycholysis may appear normal or pitted, indented, or crumbly. Thickened hyperkeratotic skin may accumulate under the detached nail, and subungual haemorrhage can occur in acute-onset cases. Onycholysis can cause discolouration of the nail, and the distal part of the nail is most commonly affected, lifting the free edge. The nail may also detach laterally or proximally, and an 'oil spot sign' may be visible as an island of onycholysis under the nail.

Treatment for onycholysis aims to prevent further trauma to the nail and nail bed, and to keep the nail dry so that it can slowly reattach. Trimming loose nails and using antimicrobial soaks, such as dilute vinegar, can help to minimise the risk of secondary infection. If the underlying cause of onycholysis is not addressed, the nail bed may form a granular layer of abnormal cells on its surface.

Frequently asked questions

An ingrown toenail is a common, usually benign foot condition that occurs when the corner of a toenail grows into the skin. It typically affects the big toe, but it can affect any toe. Symptoms include the skin growing over the nail edge, swelling, tenderness, warmth, redness, and pain.

Skin growing over the nail can be caused by several factors, including injury, nail shape, and underlying health conditions such as psoriasis, lupus, or eczema. For toenails, wearing tight shoes or cutting nails too short can also cause the skin to grow over the nail.

If the skin grows over your nail, it is important to examine your symptoms and consult a healthcare provider or a board-certified dermatologist if necessary. They can help diagnose and treat the condition. In the case of an ingrown toenail, home treatments include soaking the foot in warm water, gently lifting the edge of the nail, and placing cotton or dental floss between the nail and skin.

To prevent skin from growing over your nail, practice proper nail care and maintain short nails. Avoid cutting your nails too short or rounding the corners, especially for toenails. Take breaks from manicures and artificial nails, and use cuticle oil or remover to soften thickened skin. Manage stress, as it can also impact nail growth.

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