潰瘍
an open sore on an external or internal surface of the body, caused by a break in the skin or mucous membrane that fails to heal
:
• The doctor diagnosed him with a stomach ulcer.
醫生診斷他患有胃潰瘍。
• She had a painful mouth ulcer that made eating difficult.
她有一個痛苦的口腔潰瘍，使進食困難。
