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What Causes Vertical Black Bands On The Thumb?

Posted on Wed, 23 Nov 2016

Question: Hello Doctor, I see some vertical black bands - 3 lighter in shed and one on right thumb is bit darker. (Pictures attached). I never paid any attention - perhaps they are there for an year or so. Got a whatsapp forward, (this could be symptom of Subungual melanoma), so would like to take your opinion. Other details: I am in good health although my food intake rarely includes green vegetables (leafy or otherwise). I mostly have beans, rice, Milk and wheat based food. No tobacco/ liquor consumption. Would appreciate your advise.

Answered by Dr. Asmeet Kaur Sawhney (1 hour later)

Brief Answer:
Looks like longitudinal melanonychia, no need to worry

Detailed Answer:
Hi
Thanks for being at healthcaremagic
I am Dr Asmeet Kaur Sawhney, a dermatologist.
I have gone through your complaints as well as reviewed the attached photographs.
There is no need to worry as these are longitudinal melanonychia.
It is a common finding which is quite common in Asians and other darker races though it is also seen in association with certain drugs or hereditary.
It doesn't seem to be associated with subungual melanoma.
Regards
Dr Asmeet

Above answer was peer-reviewed by : Dr. REMY KOSHY

Follow up: Dr. Asmeet Kaur Sawhney (30 minutes later)

Thanks a lot Doctor. And I assume, there is no need to take any medicine.... right?

Answered by Dr. Asmeet Kaur Sawhney (2 hours later)

Brief Answer:
Welcome!!

Detailed Answer:
Welcome!!
There is no need to take any medicine.

Note: Hope the answers resolves your concerns, however for further guidance of skin related queries consult our Dermatologist.Click here to book a consultation

Above answer was peer-reviewed by : Dr. REMY KOSHY