Q: For the past couple of years I have noticed that the nails of my toes has turned black, especially the thumb nail of both my toes. Can you advise reason and is this any symptom for some other disease.

A:The black discoloration of your toe nails may be due to an infection- fungal or bacterial- an injury or sometimes other uncommon diseases. It will be advisable for you to be seen by a dermatologist accessible to you. He should be able to advise you.