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What do black strips inside the big toenails on both feet indicate?

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Posted on Fri, 30 Nov 2018
Question: i have a black strip from top to bottom on the inside of my big toe nail, on both feet.
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Answered by Dr. Asmeet Kaur Sawhney (1 hour later)
Brief Answer:

Longitudinal melanonychia

Detailed Answer:

Hi,

I have gone through your complaints and reviewed the attached photographs.

It seems to be longitudinal melanonychia.

It has multiple causes the most common being racial (common in dark-skinned individuals), hereditary, certain drugs, subungal naevi and cyst and rarely carcinoma and malignant melanoma.

Since it is present on both the feet it seems to be benign in nature and nothing to worry about.

Still, you can consult a dermatologist and go for dermoscopic examination of the nails.

Hope I have answered your query.

Take care

Regards,
Dr Asmeet Kaur Sawhney, Dermatologist
Above answer was peer-reviewed by : Dr. Yogesh D
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Dr. Asmeet Kaur Sawhney

Dermatologist

Practicing since :2007

Answered : 4987 Questions

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What do black strips inside the big toenails on both feet indicate?

Brief Answer: Longitudinal melanonychia Detailed Answer: Hi, I have gone through your complaints and reviewed the attached photographs. It seems to be longitudinal melanonychia. It has multiple causes the most common being racial (common in dark-skinned individuals), hereditary, certain drugs, subungal naevi and cyst and rarely carcinoma and malignant melanoma. Since it is present on both the feet it seems to be benign in nature and nothing to worry about. Still, you can consult a dermatologist and go for dermoscopic examination of the nails. Hope I have answered your query. Take care Regards, Dr Asmeet Kaur Sawhney, Dermatologist