My one side of tongue is slightly darkening.

Dr. Sajeev KumarGeneral Physician32yrs exp

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The following medical conditions are some of the possible causes of darkened tongue. There are likely to be other possible causes, so ask your doctor about your symptoms. Discolouration from dental amalgam (tooth fillings) racial pigmentation darker skinned individuals dark pigmented bacterial growth in hairy tongue disorder smoking peutz-jegher's syndrome addison's disease lichen planus heavy metals lead bismuth mercury medications antimalarial drugs malignancies malignant melanoma antibiotics poor oral hygiene. 

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