HomeAnswersDermatologynail deformityWhat could cause deformity in finger nail with crack and discoloration?

I have deep crack in only one nail with yellow discoloration. Please help.

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The following is an actual conversation between an iCliniq user and a doctor that has been reviewed and published as a Premium Q&A.

Medically reviewed by

Dr. Vinodhini J.

Published At April 22, 2020
Reviewed AtAugust 11, 2023

Patient's Query

Hi doctor,

I have a deformation on one of my fingernails with a deep crack and it is a bit yellow on a small part near the skin at the start of the nail. Please help.

Hi,

Welcome to icliniq.com.

I went through the photo you sent. (attachment removed to protect patient identity). Most probably it is a fungal infection of the nail. But I want to confirm a few things before. How long it is there? Any history of trauma? Are you having high blood sugar or any other disease? Is it painful? Please answer these questions in the follow up because the short duration and more pain will be indicative of bacterial infection. For fungal of the nail, take capsule Itraconazole 200 mg twice daily after meals for seven days per month. (seven days then no dose for three weeks, then again seven days like this). Continue for three cycles then review.

The Probable causes

The probable cause is fungal or bacterial or growth.

Investigations to be done

Do GTT (glucose tolerance test) and KOH test.

Differential diagnosis

The differential diagnosius is acute infection secondary to trauma and Beau's line due to internal disease.

Probable diagnosis

The probable diagnosis is onychomycosis.

Treatment plan

Take antifungal for one week per month for a minimum of three months.

Preventive measures

Avoid wet work. Keep hand dry.

Patient's Query

Thank you doctor,

I noticed it around a month ago. No trauma or I did not notice it. No history of high blood sugar or other disease and it is not painful.

Hi,

Welcome back to icliniq.com.

That's good. It is a fungal infection of the nail bed only. Follow the treatment given and it will slowly grow out.

Same symptoms don't mean you have the same problem. Consult a doctor now!

Dr. Subhash Kashyap
Dr. Subhash Kashyap

Dermatology

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