Lip pigmentation
Oral pigmentation may be physiologic or pathologic. Pathologic pigmentation can be classified into exogenous and endogenous based upon the cause.Exogenous pigmentation could be induced by drugs, tobacco/smoking, amalgam tattoo or heavy metals induced. And endogenous pigmentation can be associated with endocrine disorders, syndromes, infections, chronic irritation, reactive or neoplastic.
Pigmentation is defined as the process of deposition of pigments in tissues. Various diseases can lead to varied colorations in the mucosa. Pigmented lesions of oral cavity are due to:
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