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Experts say the discoloration is most commonly due to injury and is usually not a major cause for concern. However, certain conditions may be associated with white spots or lines on the nail, such as:
Muehrcke's lines were described by American physician Robert C. Muehrcke (1921–2003) in 1956. In a study published in BMJ, he examined patients with known chronic hypoalbuminemia and healthy volunteers, finding that the appearance of multiple transverse white lines was a highly specific marker for low serum albumin (no subject with the sign had SA over 2.2 g/dL), was associated with severity ...
"Trauma could cause white spots on the nails or even white lines (leukonychia)," says Dr. Mendeszoon. "Bumping one’s toe or being stepped upon may cause injury to the nail plate and dermis ...
Also known as "true" leukonychia, this is the most common form of leukonychia, in which small white spots appear on the nails. Picking and biting of the nails are a prominent cause in young children and nail biters. Besides parakeratosis, air that is trapped between the cells may also cause this appearance. [5] It is also caused by trauma.
White lines across the nail (leukonychia striata, or transverse leukonychia) may be Mees' lines or Muehrcke's lines. Small white patches are known as leukonychia punctata. Dark nails are associated with B 12 deficiency. Stains of the nail plate (not the nail bed) are associated with smoking and henna use.
Mees' lines can look similar to injury to the nail, which should not be confused with true Mees' lines. [1] Mees' lines appear after an episode of poisoning with arsenic, [2] thallium or other heavy metals or selenium, [3] opioid MT-45, and can also appear if the subject is suffering from kidney failure. [4] They have been observed in ...
In addition to the traditional tetrad symptoms, other diagnostic techniques such dermoscopy, ultrasonography, and histological findings are also used to make the diagnosis. [2] Hemorrhagic striae, white longitudinal grooves that match the nail plate channels, and perforations in the distal region of the nail plate are all visible during dermoscopy.
Beau's lines are deep grooved lines that run from side to side on the fingernail or the toenail. [1] They may look like indentations or ridges in the nail plate. [2]: 657 This condition of the nail was named by a French physician, Joseph Honoré Simon Beau (1806–1865), who first described it in 1846.