Smoker? These brown patches might NOT be dangerous Most dental students confuse this condition Smoker's melanosis is a common oral finding caused by increased melanin production due to tobacco exposure Oral Melanotic Macule MEDizzy ORAL MELANOTIC MACULE (OMM) (Also called focal melanosis labial melanotic macule) A benign, localized, flat pigmented lesion of the oral mucosa Caused by a focal increase in melanin production Oral Melanosis