Noah Sinclair
Changes in the colour, texture, shape, or thickness of your nails can sometimes signal an underlying health condition. White lines across the toenails, known as Mees' lines or Muehrcke's lines, can be indicative of acute systemic stress, malnutrition, liver disease, or kidney disease. In this paragraph, we will explore the various causes and implications of white lines across the toenails, and discuss when you should seek medical advice.
| Characteristics | Values |
|---|---|
| Name | Muehrcke's lines, Mees' lines, Leukonychia striata, Transverse leukonychia, Aldrich-Mees’ lines, Reynolds’ lines |
| Appearance | Horizontal white lines or bands across the nails |
| Cause | Nutritional deficiency, such as protein or zinc deficiency; low levels of albumin, a protein made by the liver; injury to the nailbed |
| Indication | Underlying health condition, such as acute renal failure, heart failure, ulcerative colitis, breast cancer, infection (e.g. measles, tuberculosis), systemic lupus erythematosus, exposure to toxic metals, liver disease, malnutrition, or nephrotic syndrome |
| Treatment | Consult a doctor to diagnose and treat the underlying cause |
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Mees' lines
If you notice Mees' lines on your nails, it is important to talk to a healthcare professional as they can help evaluate for poisoning or disease. A physical examination, review of medications, tests of hair and nail clippings, and blood tests can be conducted to determine the underlying cause.
While Mees' lines themselves do not require treatment, addressing the underlying cause is crucial. For example, if arsenic poisoning is the cause, finding and eliminating the source of exposure is essential. Mees' lines will eventually grow out once the underlying cause is treated or resolved.
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Muehrcke lines
It is important to note that white lines on the nails can have various causes, including minor traumas to the nail, such as biting or accidentally hitting an object. If you notice persistent white lines on your nails, it is recommended to consult a healthcare provider for a proper diagnosis and treatment.
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Leukonychia
True leukonychia is caused by injury to the nail plate or matrix, resulting in keratin disruption and trapped air within the nail plate, leading to reflection and a lack of transparency. It can also be inherited recessively or dominantly due to a mutation in the phospholipase C delta-1 gene, causing all nails to appear milky and porcelain white.
Apparent leukonychia occurs when the pathology involves subungual tissues. It is characterised by patterns such as Terry's nails, half-and-half (Lindsay's) nails, and Muehrcke's lines. It is typically caused by minor injuries, such as nail biting, or may occur during the nail growth process. It is harmless and fades with pressure on the nail.
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Health conditions
Horizontal white lines across the toenails, also known as Muehrcke's lines, can indicate a nutritional deficiency, such as a lack of protein or zinc. These lines suggest that a section of the nail was interrupted during growth and did not receive the necessary nutrients or blood flow. While Muehrcke's lines are paired lines that fade under pressure, Mees' lines are single lines that do not fade and move up as the nail grows.
Muehrcke's and Mees' lines can indicate more serious health conditions, such as:
- Kidney disease
- Liver disorders
- Acute renal failure
- Heart failure
- Ulcerative colitis
- Breast cancer
- Lupus erythematosus
- Poisoning
- Hypoalbuminemia (low levels of albumin, a protein made by the liver)
- Malnutrition
- Nephrotic syndrome
- Exposure to toxic metals
White toenails can also indicate various health conditions, including:
- Anaemia
- Overuse of nail polish
- Weak nails
- Kidney disease
- Heart disease
- Diabetes
- Rheumatoid arthritis
- Liver disease
If you notice any horizontal white lines or other colour changes across your toenails, it is advisable to consult a healthcare professional or a board-certified dermatologist for further evaluation and potential treatment.
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Nail abnormalities
Fingernail and toenail abnormalities are often a sign of infection or injury. They can sometimes indicate an underlying condition. It is recommended that you see your doctor if your nails have changed in colour, texture, shape, or thickness and you don't know why.
White lines or bands that appear across the nails, known as Mees' lines, can be a symptom of a serious underlying health condition. These lines can be a sign of acute systemic stress, such as acute renal failure, heart failure, ulcerative colitis, breast cancer, infection (e.g., measles, tuberculosis), and systemic lupus erythematosus. Mees' lines have also been associated with exposure to toxic metals like thallium. They can be caused by injury to the nail bed, but they usually go across the entire nail. Mees' lines are often confused with Muehrcke's lines, which are paired white lines that fade with pressure and are caused by low levels of protein in the blood.
Horizontal white streaks over the nails, or Muehrcke's lines, may indicate a nutritional deficiency, such as a lack of protein or zinc. These lines suggest that a section of the nail did not receive the necessary nutrients or blood flow during growth. Muehrcke's lines may also indicate more severe disorders, such as kidney disease or liver disorders.
White nails can be indicative of various conditions, including anaemia, overuse of nail polish, weak nails, kidney disease, heart disease, diabetes, rheumatoid arthritis, or liver disease. If your toenails are turning yellow, it could be due to ageing or chemicals in nail polish, or it could indicate a more serious medical condition.
In addition to colour changes, changes in nail texture and thickness can also signal abnormalities. Crumbly or brittle nails can be caused by a fungal nail infection, the skin condition lichen planus, or a thyroid disorder. Thickened nails are often caused by a fungal infection, psoriasis, long-term pressure from ill-fitting shoes, or reactive arthritis.
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Frequently asked questions
White lines across the toenails, known as Mees' lines, can indicate an underlying health condition. They are often associated with acute systemic stress, acute renal failure, heart failure, ulcerative colitis, breast cancer, infection, and exposure to toxic metals.
White lines on the toenails can also be Muehrcke's lines, which are caused by nutritional deficiencies, such as protein or zinc deficiency. They indicate that a section of the nail was interrupted during growth and did not receive adequate nutrients or blood flow.
Muehrcke's lines are paired lines that fade with pressure, while Mees' lines are single lines that do not fade with pressure. Muehrcke's lines stay in the same place, whereas Mees' lines move up as the nail grows.
If you notice white lines on your toenails, it is recommended to consult a healthcare professional or a board-certified dermatologist. They can help evaluate and diagnose any potential underlying causes and provide appropriate treatment.
Yes, changes in the colour, texture, shape, or thickness of nails can sometimes indicate underlying health conditions. For example, crumbly toenails can be caused by a fungal nail infection, lichen planus, or thyroid issues. Therefore, it is important to seek medical advice if you notice any persistent nail abnormalities.
