Mole，alsoknownasnevus，isakindofpigmentedspotwhichcanbeseeninmanyplacesonthebody，suchasfaceandneck。Thecausesofmolesvary，someareinheritedandsomeareacquiredduringtheprocessofgrowth。Itscolorcouldbedarkbrown，black，bluish，redorevenyellow。Molescanbedividedintotwotypes，congenitalmoleandacquiredmole。Congenitalmoleformsinuteroandpresentatbirth，whiletheacquiredmoleformsafterthebirth。Mostmolesarebenign，butsomemaydevelopmalignantchangesifnotobservecarefully。Forthisreason，itisnecessarytohaveregularskincheck-upsforearlydetectionandtreatmentofmalignantmoles。Inaddition，sunprotectionmeasuresshouldbetakentoreducetheriskofmalignanttransformationofmoles。