When white lines appear after an intensive manicure or after bumping your fingers, they are most likely minor injuries that will move towards the tip as the nail grows. If you’ve used harsh products or over-trimmed the cuticle, the surface may only be dull or brittle for a few days.
In people who perform manual labor, play contact sports, or wear tight shoes, repeated friction can also cause these lines. In other cases, the lines may be related to periods of illness, high fever, or physical stress that temporarily interrupt nail growth and leave visible marks.
Less frequently, nail infections, nearby skin disorders, or specific medical treatments can alter the color or growth rate.
What to do and when to consult
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