COM Jan. 2008 Diagnosis UW School of Dentistry Black and Brown: Non neoplastic Pigmentation of the Oral Mucosa Head and Neck Pathology Springer Nature Link Oral pigmented lesions: a pragmatic approach to diagnosis and management Faculty Dental Journal Figure 1 from Oral Melanosis Semantic Scholar Melanocytic Nevi (Moles) Fact Sheets Yale Medicine Perioral Pigmentation One Area. Many Diagnoses. Dark skin around the mouth is one of the most common concerns I see in my OPD but it is never just tanning.