'Ulcers' in the Bible

So the first angel went and poured out his bowl on the earth; and loathsome and malignant sores came on the people who had the mark of the beast and who worshiped his image.

and they blasphemed the God of heaven because of their anguish and their sores (abscesses, boils); and they did not repent of what they had done nor hate their wickedness.