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A member asked:
Hi , ive noticed a light brown line streak vertically stretching down my fingernail. any clue of what it might be ?
A doctor has provided 1 answer
See MD: Studies show what you are observing is longtitudinal melanonychia or melanonychia striata, fancy nomenclature for a pigmented line on your nail. There are concerning causes that are less likely including sublingual melanoma, a cancer, that should be examined by a Dermatologist and possibly ruled out by biopsy for safety. Other causes include drugs, fungus, systemic ill, or just benign pigmentation
Answered 3/8/2018
372 views
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