4black line on thumb nail

Hi, Myself MS Rana from Noida, From last 7 month i have notice that there is black line beneath on nails of thumb not by any injury.I am bitt worried why they are keep on growing.It was just one line and later I got another &now i got 2 more and merged together.TnxMS Rana Email:
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Doctor Answers (1) on 4black line on thumb nail

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Dr. Govind Suresh Mittal
6 yrs. of exp | Bangalore | Dermatologist

INR 350 for 24 hrs

Hi. Greetings. Usually such lines are not of much problem in Indians and dark skinned races. But in your case the dark lines look quite prominent. And also there's a definite pigment noted near nail n root also - as I could appreciate it in the photo . you'll need a nail matrix biopsy. Meet a dermatologist at the earliest. Hope this helps.
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