I am trying to determine if this dark
spot on my lip is a venous lake, melantonic macule, or some other lesion. I am 25, not a smoker, and occasionally take B vitamin supplements.
The spot is right above the vermillian border of my lower lip, dead in the center on the line where the mucosa begins, approximately 2 mm. The discoloration appears to be below the epidermis. It certain lighting it appears bluish, but under ordinary indoor lighting it appears greyish.