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Why do black patches appear on the tongue?

Prof B Krishna Rau
Professor and Head of Dept. of Surgery,
Sri Ramachandra Medical College, Chennai

Q: Today for the first time I noticed some black patches on my tongue. They were never there before. They neither hurt nor feel itchy. Could you please tell me what are these patches?

A:The pigmentation could be due to:

  1. Vitamin B6 deficiency.
  2. Intestinal parasites.
  3. Normal Pigmentation.
All in all there is nothing to be seriously worried about.