溃疡
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.
医生诊断他患有胃溃疡。
• She had a painful mouth ulcer that made eating difficult.
她有一个痛苦的口腔溃疡，使进食困难。
