ulcers

noun
  1. 1

    An open sore of the skin, eyes or mucous membrane, often caused by an initial abrasion and generally maintained by an inflammation and/or an infection.

  2. 2

    Peptic ulcer

  3. 3

    Anything that festers and corrupts like an open sore; a vice in character.

Source: https://en.wiktionary.org/wiki/ulcer, https://en.wiktionary.org/wiki/ulcers