Liam Carter
Toenail problems are common and can affect people of all ages, but they tend to be more prevalent in older individuals. There are many reasons why the top layer of a toenail may not be growing from its base. One possible explanation is onycholysis, a condition where the nail separates from the skin beneath it, often due to injury, fungus, or psoriasis. Another possibility is retronychia, which is caused by repetitive injury to the nail, often from wearing tight shoes or participating in activities that lead to toenail trauma. In some cases, toenails may grow upward due to genetic factors, foot shape, or medical conditions such as onychogryphosis, nail-patella syndrome, or koilonychia. Understanding the underlying cause is crucial for determining the appropriate treatment, which may include medical intervention or simple home remedies.
| Characteristics | Values |
|---|---|
| Condition | Onycholysis (Nail Separation) |
| Cause | Nail injury, fungus, psoriasis, yeast infection, thyroid disease |
| Symptoms | Nails lifting or peeling away from the nail bed |
| Treatment | Antifungal medication, removing affected nail, avoiding irritants, keeping nails short and dry |
| Prevention | Keeping nails trimmed, avoiding nail biting, wearing comfortable and well-fitting shoes |
| Regrowth Time | Fingernails: 4-9 months; Toenails: 8-18 months |
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What You'll Learn
- Onycholysis, or nail separation, can be caused by injury, fungus, or psoriasis
- Toenails grow from a process called keratinization, where cells multiply and layer
- The nail matrix is the root of the nail, where new cells are made
- Toenails can grow upward due to shoes, foot sweat, or medical issues like onychogryphosis
- Toenail problems can be caused by trauma, ill-fitting shoes, poor circulation, and infection
Onycholysis, or nail separation, can be caused by injury, fungus, or psoriasis
Onycholysis is a condition in which the nail separates from the skin beneath it, or the nail bed. It is easy to spot—the nail begins to lift or peel away from the nail bed, and a white or yellow patch appears at the tip of the nail, growing down until it reaches the cuticle. Bacteria may grow under the nail, turning it green, and the nail can also become infected.
Onycholysis is often caused by injury to the nail or the nail matrix (the area where nails start to grow). This can be caused by bumping or hitting your nails, wearing shoes that are too small, keeping your nails in water for too long, or even getting regular manicures. However, it can also be caused by fungal infections, which occur when fungi get between your nail and nail bed, usually through cracks or cuts in your fingers or toes. Nails affected by fungus tend to become thick and yellow, and they may show white spots and streaks.
Fungal nail infections can be treated with oral or topical antifungal medications. Oral medications may include terbinafine (Lamisil®), itraconazole (Sporanox®), and fluconazole (Diflucan®). Topical medications come in the form of creams, ointments, or gels that are rubbed directly onto the nails. It is important to finish the full course of medication, as nail fungi can be difficult to treat.
Onycholysis can also be caused by nail psoriasis, an autoimmune condition that affects the fingernails and toenails. It causes discoloration, pitting, and changes in nail structure. There is no cure for nail psoriasis, but treatments can alleviate symptoms. Prescription and over-the-counter medications can reduce symptoms, and corticosteroids can be particularly helpful.
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Toenails grow from a process called keratinization, where cells multiply and layer
Toenails, like hair, grow through a process called keratinization. This process involves the multiplication and layering of cells.
Keratinization begins with the multiplication of epidermal cells below the nail root, which move up to the surface of the skin. As they migrate towards the surface, these cells flatten and press tightly together. Each cell becomes a thin plate, and these plates pile into layers to form the nail. As the nail cells accumulate, the nail is pushed forward.
The nail matrix, or the "factory" where new nails are made, is located beneath the nail bed. It is made up of special cells that produce 196 layers of cells to form each toenail. The nail plate, or the visible hard nail area, is made of translucent keratin protein. The keratin in the nail plate is formed through the process of keratinization.
Toenails grow much slower than fingernails, taking about 12 to 18 months to grow completely out. This slow growth rate is why toenails may not appear to be growing from the base. Additionally, certain injuries and illnesses can damage the nail matrix and affect how the nails grow. For example, onycholysis, a condition in which the nail separates from the nail bed, can cause the nail to stop growing temporarily. However, with proper treatment, healthy nails can grow back even after falling off.
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The nail matrix is the root of the nail, where new cells are made
The nail matrix is a delicate structure located behind and under the nail's base. It is protected by a fold of skin called the proximal nail fold. The proximal area of the matrix forms the upper layers of the nail plate, while the lower layers originate from the distal end of the matrix. The nail plate cells bond together to form layers, which then unite to create the nail plate. The length of the matrix determines the thickness and shape of nail growth. A longer nail matrix will result in a thicker nail, while a shorter matrix will produce a thinner nail.
Injuries or trauma to the nail matrix can result in visible imperfections in the growing nail plate. These traumas can cause bruising, ridges, discolouration, or even nail loss. Minor damage to the nail matrix can cause temporary changes in nail appearance, such as ridges or grooves, but the nail will usually grow back without noticeable damage. However, severe damage can lead to permanent deformities in the nail plate.
Certain illnesses and health conditions can also affect the nail matrix and interfere with nail growth. For example, fungal infections, eczema, and psoriasis can impact the nail matrix. Additionally, serious health events like heart attacks, COVID-19, or pneumonia can interrupt nail growth and cause horizontal ridges known as Beau's lines. Chemotherapy and other medications may also cause Beau's lines or slow nail growth.
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Toenails can grow upward due to shoes, foot sweat, or medical issues like onychogryphosis
Toenails that grow upward are not uncommon. This unusual nail growth could be hereditary. However, it could also be caused by ill-fitting shoes, foot sweat, or medical issues like onychogryphosis.
Shoes
Wearing shoes that are too small can cause trauma to the nail matrix, which is the "factory" where your body makes new nails. This trauma can cause nail separation, a condition called onycholysis. Onycholysis can also be caused by keeping your nails in water for too long, going to the nail salon frequently, or exposure to chemicals in nail products.
Foot Sweat
It's important to keep your feet clean and dry to prevent upward nail growth. Toenails that grow upward tend to rip more often, exposing the area to infection, so careful hygiene is vital. Inspect your toenails at least once per week, and wash and thoroughly dry your feet.
Onychogryphosis
Onychogryphosis is a nail disease that causes one side of the nail to grow faster than the other. It is also known as ram's horn nails because it causes the nails to thicken, curve, and resemble the shape of a ram's horn or claw. This condition mostly affects the big toes. The exact cause of onychogryphosis is not completely known, but it may be related to peripheral vascular disease, poor peripheral circulation, skin diseases, or genetic factors. Treatment options include surgery, lifestyle changes, medication, and proper footwear to prevent excessive nail pressure on the nail bed.
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Toenail problems can be caused by trauma, ill-fitting shoes, poor circulation, and infection
Toenail problems can be caused by a variety of factors, including trauma, ill-fitting shoes, poor circulation, and infection.
Trauma to the toenail can occur due to repetitive rubbing against shoes when walking or running, especially if the shoes are too tight or loose, leading to increased friction. Sudden injuries, such as stubbing your toe or dropping an object on it, can also cause toenail trauma. In some cases, toenail trauma may lead to the nail becoming loose or separated from the nail bed, known as onycholysis. This condition can be treated by cutting away the separated nail as it grows out, typically taking 12 to 18 months for complete regrowth.
Ill-fitting shoes can also cause toenail problems, such as increased friction, pressure, and toenail injury. When shoes are too snug, they can cause bleeding under the toenail, known as a subungual hematoma. Additionally, wearing narrow, pointed, or high-heeled shoes can increase the risk of ingrown toenails, especially on the big toe, due to the pressure and repeated micro-trauma on the toes.
Poor circulation, often associated with conditions like peripheral artery disease (PAD), can affect nail growth and health. PAD causes reduced blood flow to the legs and feet, impacting the nails' appearance and growth rate.
Lastly, toenail fungal infections are common, especially with advanced age, certain diseases (e.g., diabetes, circulation problems), and a weakened immune system. Toenail fungus can cause the nail to thicken and turn yellow, with white spots and streaks. Treatment for fungal infections typically involves oral or topical antifungal medications, debridement (trimming away thickened areas), or a combination of these approaches.
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Frequently asked questions
Toenails grow when cells multiply in the base of each nail, then layer on top of each other and harden. This process is called keratinization. Toenails grow slowly, taking 8 to 18 months to grow completely out. If your toenail is not growing from the base, it may be experiencing onycholysis, a condition where the nail separates from the skin beneath it. Onycholysis is often caused by injury to the nail or nail matrix, fungal infections, or skin diseases such as psoriasis. Treatment for onycholysis may involve cutting away the separated nail as it grows out or taking antifungal medications.
Treatment for onycholysis involves addressing the underlying cause. If onycholysis is caused by an injury, the nail will eventually grow out, and you can use nail clippers or scissors to remove the affected nail. If onycholysis is caused by a fungal infection, you may need to take oral or topical antifungal medications. It's important to finish the full course of antifungal medication. Other tips to prevent and treat onycholysis include keeping your nails trimmed short, avoiding nail-biting, and being cautious with nail polish and chemicals.
Toenail problems can be caused by various factors, including trauma, ill-fitting shoes, poor circulation, poor nerve supply, and infection. Certain medical conditions, such as peripheral artery disease (PAD), can also affect toenail growth by reducing blood flow to the feet. Skin diseases like psoriasis, eczema, lichen planus, and lupus can also cause abnormalities in the nails, such as pits, grooves, or crumbling nails. Toenails that grow upward, known as vertical nails, may be influenced by hereditary factors, tight shoes, or profuse foot sweating.
