The big toe and the third toe of the foot in this picture show yellow nails. Diagnosis is Onychomycosis of the nails due to uncontrolled diabetes.

Oral antifungal with a local application of antifungal with control of diabetes to a target HbA1c of 6.5-7.0% will not only cure the infection but also avoid recurrence and the other vascular complications of diabetes mellitus.

Care by a doctor experienced in diabetes or an Endocrinologist will be important.

For further details, please gander through these articles:

1. Article Onychomycosis in patients with diabetes Onychomycosis in pat...

2.Article Toenail Onychomycosis in Diabetic Patients

3. Article Treatment of Onychomycosis in Diabetic Patients

Dear Prof. Muhammad Yousuf,

Alsalam o Aliekom,

Thank you so much for your valued response and precious recommendation.

I will inform him about your answer and follow up his efforts.

Let me appreciate you again for your time and precious response

Best regards

Jalil

Looks like onychomycosis in a diabetic patients.

Treatment is as outlined in the thread above.