The article analyzes the origins of the popular names of abscess, boil in dialects of the Karelian language, which were extracted from the dictionaries of the Karelian language, samples of the Karelian speech, as well as the author’s field materials. Among the lexicon group under consideration, deverbal names (aja­jaine, ajamin(е), ajandahine, ajos, ajotus, paize and their dialectal variants), borrowings (bajar(i), herra), as well as such nomination methods as external nomination (märkä­ajoš, märgybul'ku, märgybul'bakko, märgypahku, märkäpiä, märgärökkö, märgyčuhmakko and their dialectal variants), nomination for the method of treatment (majoapaiže, majuapaize, majaimpaize) and metaphorical transference (kaźinkarva, kažinkarvu). The research is carried out in a comparative aspect with names in other Finnic languages.