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. 2000 Jul 15;321(7254):162–165. doi: 10.1136/bmj.321.7254.162
• Local •  Deficiency states
  Candidiasis Vitamin B
  Erythema migrans Folate
  Lichen planus Iron
• Psychogenic • Diabetes mellitus
  Cancerophobia • Dry mouth
  Depression • Drugs (such as captopril)
  Anxiety • Denture problems
  Hypochondriasis • Parafunctional habits