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San Antonio, TX
A 34-year-old female asked:

can stress be the cause of the black little vertical lines that i have on my left and right thumb nail or because not enough iron?

1 doctor answer3 doctors weighed in
Dr. Cheryl Levin
Dermatology 16 years experience
Various causes: This sounds like splinter hemorrhages. There are various causes, such as injury to the nail or other internal causes (including infections) please see your healthcare provider to fully assess.

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Last updated Jan 30, 2019
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