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What could cause dark vertical stripes on my nails?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

I have a few concerns. A few dark vertical stripes have appeared on my nail. The one on my right thumb is in the middle, and it has been there for the last two weeks now.

Kindly help.

Hello,

Welcome to icliniq.com.

I understand your concern.

Do u have any symptoms or any other systemic complaints like diabetes or hypertension? And are you on any medication?

Please reply.

Kind regards.

Patient's Query

Hello doctor,

Thank you for the reply.

There are no other symptoms at all, as you asked. I am currently on C-Tax medication and an antibiotic.

Hello,

Welcome back to icliniq.com.

You are suffering from longitudinal melanonychia, which has numerous causes. In your case, it might be due to decreased vitamin D, a thyroid disorder, or raised liver enzymes. I would advise addressing these through proper medication, and the condition should subside in a few weeks.

I hope you are satisfied with my answer.

For further queries, you can consult me at iCliniq.

Thank you.

Medically reviewed byDr. Nithila. A

Published At July 26, 2019
Reviewed AtSeptember 1, 2025

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