A member asked:

I have a greyish line going down two of my nails, one on my hand and the other on my toe nail. it doesnt hurt or anything. i have waited 3 weeks and it hasnt changed color/expanded or faded away. its still there the same day it appeared.

A doctor has provided 1 answer
Dr. Stuart Hickerson answered

Specializes in Family Medicine

Grey lines: Grey lines on the toe nails can be the following: subungual hematoma, fungal infection, melanoma. Odd conditions like Agyria possible (silver toxicity) or some type of heavy metal collection. Given it has not gone away in 3 weeks you should be evaluated.

Answered 12/16/2019

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