A member asked:

Is black vertical line on toenail contagious? i worry if i can get it from someone who has it. is it caused by fungus or bacterial infections?

A doctor has provided 1 answer
Dr. Heidi Fowler answered

Specializes in Psychiatry

Melanonychia Striata: Melanonychia striata is a brown-black lines in the nail the goes from the base to the tip of the nail. Get it checked just to make sure it isn't related to a malignancy

Answered 6/20/2020

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