In a nutshell
Individual white dots in the nail plate often arise after small, long-forgotten injuries. They move forward as the nail grows. These pinpoint spots are not a reliable sign of calcium deficiency.
Why does it happen?
A temporary disruption of keratinization in the nail matrix changes how light scatters in the developing nail plate. Larger white areas, transverse bands, or changes in the nail bed do not necessarily have the same mechanism.
Frequency
Individual small white nail spots are common. Extensive whitening or recurrent transverse bands are different manifestations and are not included in this classification.
Frequency is a qualitative description, not your individual probability.
Is it normal?
Individual spots that move with nail growth are normal.
When to seek advice
Changes affecting many nails at once, transverse bands, brittleness, or accompanying symptoms should be assessed.
Does this happen to you?
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Sources (1)
- DermNet: White nail (opens a new tab)
This source supports the description and physiological context of this entry.
Editorial update: . AI-assisted research and editing; not individually reviewed by a physician. How we research
