ulcer
Medical term for an open sore on the skin or a mucous membrane, such as a stomach ulcer.
Treatment for a stomach ulcer can take time.
A mouth sore can sometimes develop into an ulcer.
stomach ulcer; gastric ulcer
skin ulcer
peptic ulcer
venous ulcer; stasis ulcer; varicose ulcer
stress ulcer
Standard kanji spelling for medical 'ulcer'.
The kanji 潰 means 'to crush' or 'to fester', and 瘍 means 'sore' or 'boil'. Together they form the medical term for ulcer. The reading かいよう is the on'yomi for both characters.