Sophia Delgado
Toenails are made of a protein called keratin, which grows from an area below the skin called the matrix. The growth of toenails can be impacted by several factors, including genetics, injuries, footwear, and underlying medical conditions. One such condition is onychogryphosis, also known as ram's horn nails, where the toenail grows substantially more and faster than usual, often affecting the big toe. Another condition is retronychia, where the nail plate grows into the nail fold, causing multiple layers of nail plates to stack under the old nail plate. In some cases, a secondary toenail may grow underneath the existing one due to trauma or pressure on the toenail. Proper toenail care, including regular trimming, maintaining foot hygiene, and wearing comfortable shoes, is essential to prevent infections and other complications.
| Characteristics | Values |
|---|---|
| Condition | Retronychia, Onychogryphosis, Ingrown toenails |
| Causes | Trauma, Repeated micro-trauma, Wearing tight or ill-fitting shoes, Repetitive activities like dancing and jogging, Pressure on the tip of a toenail |
| Symptoms | Pain, Inflammation, Discoloration, Infection, Thickened nails, Curved nails |
| Treatment | Antibiotics, Surgery, Trimming nails, Cleaning and drying feet, Avoiding tight shoes |
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What You'll Learn
- Toenails growing on top of each other is called retronychia
- Retronychia is caused by a disruption to a growing nail plate
- Trauma to the toe, such as injury or ill-fitting shoes, can cause retronychia
- Onychogryphosis is a condition where toenails grow abnormally and can twist and turn in various directions
- Toenails that grow upward could be due to hereditary factors, footwear, or foot sweat
Toenails growing on top of each other is called retronychia
Retronychia is a type of ingrown nail where the toenail ingrows at the cuticle (or more specifically, the proximal nail fold) rather than at the sides of the nail plate. The nail plate grows backward into the nail bed, and can be very painful. It is characterised by repeated flares of infection and inflammation (swelling) at the cuticle, and is typically caused by repeated trauma, such as walking downhill for a long time, or shear/friction from running in ill-fitting footwear.
Retronychia most often affects the big toenails and is caused by repetitive injury to the nail, most often by wearing tight shoes or by doing activities that lead to toenail injury. In the acute stage, this condition is painful and causes inflammation of the nail fold, yellow or white discoloration of the nail plate (xanthonychia), and growth of new connective tissue on the inflamed areas (granulation tissue). Toenails growing upward could also have more complex medical explanations, such as onychogryphosis, a thickening of the nails due to injury or infection. It mostly affects the toes, specifically the big toes. This condition is also known as ram's horn nail and claw nail because it causes the nails to curve and resemble the shape of a ram's horn or claw.
To prevent retronychia, it is important to avoid activities that injure the nail and wear shoes with more space around the toes to relieve pressure on the affected toenail. It is also important to keep your feet clean and dry, and trim your nails frequently.
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Retronychia is caused by a disruption to a growing nail plate
Toenails growing upward is a common issue and can be prevented by keeping your feet clean and dry, and trimming your nails frequently. However, in some cases, toenails growing upward can be indicative of more complex medical conditions. One such condition is retronychia, which is caused by a disruption to the growing nail plate.
Retronychia is a rare condition, with fewer than 100 cases reported in the literature. It occurs when the nail plate, the hard part of the nail made of the protein keratin, grows into the nail fold. This results in multiple generations of new nail plates growing on top of one another in a stack under the old nail plate, as the nail matrix and the old nail plate become misaligned. The growth of the new nail plate pushes the old nail upwards. Retronychia predominantly affects the big toenails and is caused by repetitive microtrauma to the nail, often due to wearing tight shoes or engaging in activities that lead to toenail injuries.
The acute stage of retronychia is characterised by pain, inflammation of the nail fold, yellow or white discoloration of the nail plate (xanthonychia), and the growth of new connective tissue on inflamed areas (granulation tissue). In the chronic stage, the inflammation resolves, but the nail plate thickens and separates from the nail bed. Layers of nail plates can become stacked, and the cuticle may be missing. Diagnosis of retronychia is clinical and based on the appearance of the nail, including layered nail plates and the absence of the cuticle. Treatment options for acute retronychia include topical and intralesional corticosteroids, while chronic retronychia may require nail removal.
To prevent retronychia, it is important to avoid activities that cause toenail injuries and to wear shoes with more space around the toes to relieve pressure on the toenails. Additionally, maintaining good foot and toenail hygiene is crucial. This includes regularly inspecting your toenails, cleaning under your nails, washing and drying your feet thoroughly, moisturising, and filing your nails to ensure smoothness.
While retronychia is a rare condition, it is important to be vigilant about any unusual changes or growths in your toenails. If you notice any abnormalities, it is recommended to consult a doctor for further advice and treatment.
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Trauma to the toe, such as injury or ill-fitting shoes, can cause retronychia
Trauma to the toe, such as an injury or ill-fitting shoes, can cause retronychia. Retronychia is a condition where the nail plate grows into the nail fold, with multiple layers of new nail plates forming on top of each other under the old nail plate. This can be caused by repetitive injury to the nail, often due to wearing tight or ill-fitting shoes, or participating in activities that lead to toenail injuries, such as jogging, hiking, or dancing.
To prevent retronychia, it is important to wear properly fitting shoes with a wide toe box or open toes. This allows the toes to have enough space to prevent pressure on the toenails. Avoiding activities that put pressure on the toes, such as running or hiking, can also help lower the risk of developing retronychia.
If retronychia occurs, treatment options are available to relieve symptoms and promote normal nail growth. These include changing to more suitable footwear and, in severe cases, undergoing surgery to remove part or all of the affected toenail. It is important to consult a healthcare professional, such as a podiatrist, for proper diagnosis and treatment.
Additionally, maintaining good foot and toenail hygiene is crucial. This includes regularly inspecting the toenails, trimming them straight across, and keeping the feet clean, dry, and moisturized. These practices can help prevent issues such as fungal infections and ingrown toenails, which can also contribute to trauma and nail abnormalities.
In some cases, underlying health conditions or the natural shape of the nails or feet may contribute to the development of retronychia. Therefore, it is essential to be mindful of any unusual changes or growths and seek medical advice if needed.
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Onychogryphosis is a condition where toenails grow abnormally and can twist and turn in various directions
Onychogryphosis mostly affects the big toes, but it can impact any of the toes on either foot. The nail plate initially grows upwards and then deviates laterally towards the other toes. This abnormal growth can cause pain and difficulty in wearing shoes and socks, affecting mobility and independence. Repeatedly hurting the toes or wearing shoes that are too small can also damage the nail plates, leading to onychogryphosis.
While surgery is the definitive treatment for onychogryphosis, conservative management includes limiting pressure on the nail bed and using mechanical debridement. To prevent the condition, it is essential to promote nail health by keeping the feet clean and dry, trimming nails regularly, and wearing properly fitted shoes.
Retronychia is another condition where multiple generations of new nail plates grow on top of each other due to repetitive injury to the nail, often caused by tight shoes. This condition can cause pain, inflammation, and yellow or white discolouration of the nail plate.
It is important to monitor your nails for any unusual changes or growths, as they can indicate underlying health issues. If you notice any abnormalities, it is recommended to consult a doctor for advice and treatment.
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Toenails that grow upward could be due to hereditary factors, footwear, or foot sweat
Toenails growing upward is a common issue that could be caused by a variety of factors, including hereditary factors, footwear, or foot sweat.
Hereditary Factors
The speed, thickness, and strength of nail growth are often determined by genetics. Unusual nail growth, such as toenails growing upward, could also be hereditary. Nail patella syndrome (NPS), for example, is a genetic disorder that occurs in 1 in 50,000 people and results in nail abnormalities.
Footwear
Tight or ill-fitting shoes can cause toenails to grow upward by pushing at the tips of the toenails. This repetitive pressure and injury to the nail can lead to a condition called retronychia, where multiple generations of new nail plates grow on top of each other under the old nail plate, pushing it upwards. To prevent this, it is recommended to wear shoes with more space around the toes to relieve the pressure.
Foot Sweat
Profuse foot sweating can also contribute to toenails growing upward. Keeping your feet clean and dry can help prevent this issue from arising or worsening. Wearing thick, natural fiber socks can help absorb sweat and cushion the friction between your toenails and shoes.
In addition to these factors, toenails growing upward could also be related to more complex medical conditions such as onychogryphosis, a thickening of the nails due to injury or infection, or koilonychia, which can be a sign of iron deficiency anemia, malnutrition, or other underlying health issues. If you notice any issues with your toenails, it is recommended to consult a doctor for further advice and guidance.
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Frequently asked questions
This condition is called retronychia, which occurs when the nail plate (the hard part of the nail) grows into the nail fold. It is caused by repetitive injury to the nail, often by wearing tight shoes.
In the early stages, you may experience some mild pain or discomfort in the affected toe. You may also notice that the base of the nail looks discoloured, which is the appearance of the second toenail beneath.
If you notice any of the symptoms mentioned above, make an appointment to see your doctor. You will usually be given an antibiotic to curb any infection before having the original toenail removed so that the second one can grow properly.
To prevent retronychia, avoid doing activities that injure the nail and wear shoes with more space around the toes to relieve pressure on the toenail.
Yes, toenails can also grow upward, which could be hereditary or the result of wearing ill-fitting shoes.
