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Dr. Andrew Rynne
Dr. Andrew Rynne

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Exp 50 years

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What causes a brown line on right leg thumb finger under the nail?

Answered by
Dr. Rahul Kumar


Practicing since :2010

Answered : 6302 Questions

Posted on Tue, 7 Jun 2016 in Skin Hair and Nails
Question: I got a brown line on my right leg thumb finger under the nail. What is it and what to do to reduce it?
Answered by Dr. Rahul Kumar 2 hours later
Brief Answer:
Photograph required

Detailed Answer:
Thanks for the query.
Occasional pigmentation of nail is common.
Don't worry about that.
If possible upload a photograph of the involved area.
This will help me in giving a closer diagnosis.
Waiting for your response.
Thank you
Above answer was peer-reviewed by : Dr. Deepak
Follow up: Dr. Rahul Kumar 40 minutes later
I sent my thumb photo. Just check it sir
Answered by Dr. Rahul Kumar 14 hours later
Brief Answer:

Detailed Answer:
Thanks for the photograph.
It is called as melanonychia or in simple words pigmentation of a single nail.
It is harmless and doesn't require treatment however if you want it can be treated with tablet melano Tx. It is a combination of proanthocyanidin and mefanimic acid.
It is to be taken daily for 3 months and gives good response.
It might not be available over the counter.
Please meet a dermatologist and get it prescribed.
Let me know if you have any other doubts.
Thank you
Above answer was peer-reviewed by : Dr. Sonia Raina

The User accepted the expert's answer

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