Noah Sinclair
White nails, or leukonychia, are a common condition and are generally harmless. They are usually caused by some form of stress to the nails, such as an injury, infection, or allergic reaction. In some cases, white nails can be a symptom of an underlying systemic disease or condition. Therefore, it is important to consult a healthcare professional if you notice any changes in your nail colour, as it could indicate the presence of a more serious condition.
| Characteristics | Values |
|---|---|
| Name | Lunula (pl.: lunulae); from Latin 'little moon' |
| Description | Crescent-shaped whitish area of the bed of a fingernail or toenail |
| Formation | Appears by week 14 of gestation |
| Function | Has a primary structural role in defining the free edge of the distal nail plate (the part of the nail that grows outward) |
| Location | At the end of the nail that is closest to the skin of the finger, but still under the nail |
| Colour | Not actually white but appears so when seen through the nail |
| Sensitivity | A very delicate part of the nail structure; damage to the lunula will permanently deform the nail |
| Related Conditions | Renal disease, heart failure, chronic renal failure, cyanosis, depression |
| Types of Leukonychia | True leukonychia, apparent leukonychia, pseudoleukonychia, punctate leukonychia, striate leukonychia |
| Causes of White Spots | Injury, fungal infection, allergies, certain medications, poisoning, systemic diseases, hereditary conditions |
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What You'll Learn
- The white part of a nail is called a lunula
- White nails are the most common nail dyschromia and are known as leukonychia
- Leukonychia can be classified as true leukonychia or apparent leukonychia
- White nails can be a marker of an underlying systemic disease
- White spots on nails are a common condition and are generally harmless
The white part of a nail is called a lunula
Lunulae cover the bottom of the nail, just above the cuticle. They are part of the nail matrix, which refers to the tissue just beneath the nail. The matrix contains nerves, lymph, and blood vessels, and it produces the cells that become the hardened nail plate. In most cases, the lunula is half-moon-shaped and has unique histologic features. It appears by week 14 of gestation and plays a primary structural role in defining the free edge of the distal nail plate (the part of the nail that grows outward).
White nails, or leukonychia, are a common condition and are generally harmless. They are usually caused by injury, such as biting or bumping your nails, but they can also be caused by fungi, allergies, or certain medications. In rare cases, white nails can be a symptom of an underlying systemic disease. If you notice any changes to the appearance of your lunulae, it is important to consult a doctor.
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White nails are the most common nail dyschromia and are known as leukonychia
White nails, also known as leukonychia, are the partial or full discolouration of the nail plate on one or more fingernails or toenails. The nail loses its general pink undertone and appears white. White nails are the most common type of nail dyschromia. Leukonychia can be classified by underlying pathology, its distribution, or how it develops.
There are three types of leukonychia: true leukonychia, apparent leukonychia, and pseudoleukonychia. True leukonychia is discolouration due to abnormal nail plate keratinisation. The white colour will not be hidden by applying pressure to the nail plate. Apparent leukonychia is secondary to a disease of the nail bed. This discolouration disappears with pressure application on the nail. Pseudoleukonychia is the whiteness of the superficial nail plate, caused by external factors.
Leukonychia can also be classified as partial or total. Total leukonychia refers to the whitening of the entire nail plate, while partial leukonychia has three subtypes: striate, punctate, and transverse. Striate leukonychia, also known as Mees lines or transverse leukonychia, may follow damage to the nail matrix, and can result in the appearance of furrows and ridges. Punctate leukonychia occurs after nail biting, manicuring, knocks, tight footwear use, or other types of trauma. Transverse leukonychia is characterised by one or more white horizontal bands across the entire nail in parallel with the lunula.
The lunula is the crescent-shaped whitish area at the base of a fingernail or toenail. It is not actually white but only appears so when seen through the nail. The lunula is a delicate part of the nail structure and is located at the end of the nail closest to the skin of the finger. It is part of the nail matrix, which is the tissue just beneath the nail that contains nerves, lymph, and blood vessels.
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Leukonychia can be classified as true leukonychia or apparent leukonychia
The white part of a nail is a medical condition called leukonychia, which is derived from the Greek words "leuko" (white) and "onyx" (nail). Leukonychia can be classified as true leukonychia or apparent leukonychia.
True leukonychia is a partial or whole nail plate discolouration caused by injury to the nail plate or matrix. It is characterised by keratin disruption with trapped air within the nail plate, resulting in reflection and a lack of transparency. This type of leukonychia will not be hidden by applying pressure to the nail plate.
Apparent leukonychia, on the other hand, is caused by changes in the nail bed that are visible through the nail plate. It is often secondary to a disease of the nail bed or minor injuries such as nail-biting. This type of leukonychia can be identified by applying pressure to the nail, which will cause the white appearance to disappear.
Both types of leukonychia can be partial or total. Partial leukonychia has three subtypes: punctate, transverse, and longitudinal. Punctate leukonychia occurs after nail biting, manicuring, knocks, and tight footwear use. Transverse leukonychia, also known as striate leukonychia or Mees lines, presents as furrows and ridges in the nail and may follow damage to the nail matrix. Longitudinal leukonychia, or leukonychia striata, appears as bands or "stria" that run parallel to the lunula (the crescent-shaped whitish area at the base of the nail). Total leukonychia refers to the whitening of the entire nail plate, which can occur in both true and apparent leukonychia.
While leukonychia may be a cosmetic concern, it is important to note that it could also indicate an underlying systemic disease. Therefore, a thorough physical examination and medical history evaluation are recommended for diagnosis. In some cases, blood tests to evaluate renal and liver function may be necessary to rule out potential causes such as kidney failure or liver issues.
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White nails can be a marker of an underlying systemic disease
White nails, or leukonychia, are a common condition and are generally harmless. They are usually caused by injury to the nail, such as nail-biting, knocks, or manicuring. However, in some cases, white nails can be a marker of an underlying systemic disease.
Systemic diseases that may cause nail discoloration include renal disease, liver cirrhosis, and psoriasis. For example, chronic renal failure can cause an increase in melanin production, leading to a brown nail bed. Additionally, white nails can be a rare symptom of more severe systemic disorders such as diabetes, heart failure, and HIV.
White nails can also be congenital, inherited recessively through a mutation in the phospholipase C delta-1 gene, although dominant patterns are possible. This condition, known as familial leukonychia, causes the nails to appear milky and porcelain white and may also be secondary to systemic disease. Therefore, the presence of white nails may warrant further investigation and a work-up for systemic disease.
To diagnose the underlying cause of white nails, a healthcare provider may recommend several tests. These can include a biopsy, blood tests, or a potassium hydroxide (KOH) preparation to check for the presence of fungi. A thorough history and physical examination may also be sufficient for diagnosis. Treating the underlying condition will typically restore the nail's appearance and improve overall health.
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White spots on nails are a common condition and are generally harmless
White spots on nails, also known as leukonychia, are a common and generally harmless condition. They often appear after nail-biting, knocks, or bangs, but can also be caused by fungi, allergies, or certain medications. In some cases, they may be a marker of an underlying systemic disease.
Leukonychia can be classified as true leukonychia, apparent leukonychia, or pseudoleukonychia. True leukonychia occurs when white spots form in the area where the nail starts to grow (nail matrix) and appear in the hard part of the nail (nail plate). This type of leukonychia is caused by abnormal nail plate keratinisation, resulting in trapped air within the nail plate and a loss of transparency. Apparent leukonychia, on the other hand, occurs when white spots form on the skin beneath the nail (nail bed). This type is typically secondary to a disease of the nail bed and can be identified by applying pressure to the nail, causing the white spots to disappear. Pseudoleukonychia, or onychomycosis, is caused by external factors such as fungi, which can be identified through a fungal culture test.
While white spots on nails are usually harmless, they can sometimes indicate more serious underlying conditions. For example, changes in nail colour, such as leukonychia, can be a symptom of systemic and skin diseases. In some cases, it may be a marker of renal disease, with the nail turning half-brown and half-white. A red lunula may signal heart failure, while blue nails could indicate cyanosis, a condition resulting from poor circulation or inadequate oxygenation of the blood. Additionally, white spots on nails can be a rare symptom of systemic diseases such as diabetes, heart failure, HIV, liver cirrhosis, or psoriasis.
If you notice white spots on your nails and are concerned, it is recommended to consult a healthcare professional. They may suggest a biopsy, blood test, or fungal culture test to help diagnose the cause and determine the appropriate treatment. Treatment options may include stopping the use of certain nail products or taking antifungal medications. In some cases, the white spots will disappear as the nail grows out naturally.
In summary, white spots on nails are a common occurrence that is usually harmless. However, it is important to monitor any changes in nail appearance and seek medical advice if you notice any unusual symptoms or are concerned about the appearance of your nails.
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Frequently asked questions
The white part of your nail is called a lunula (pl.: lunulae; from Latin 'little moon'). It is the crescent-shaped whitish area at the base of your fingernail or toenail. In most cases, it is half-moon-shaped and has unique histologic features. Lunulae are generally harmless and are usually not a cause for concern.
The white part of your nail, or lunula, can be caused by various factors, including injury, infection, or an allergic reaction. In some cases, it may be a sign of an underlying condition, such as a systemic disease or renal failure.
If you notice any changes in the appearance of your nails, such as discolored or missing lunulae, and are experiencing other unusual symptoms, it is recommended to consult a doctor. If your hands and feet are also turning blue, seek immediate medical attention as it could be a sign of cyanosis, a condition resulting from poor circulation or inadequate oxygenation of your blood.
