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.
医師は彼に胃潰瘍と診断した。
• She had a painful mouth ulcer that made eating difficult.
彼女は痛い口内潰瘍があり、食事が困難だった。
