口內炎 [－内－]

Jyutping hau2 noi6 jim4
Pinyin kǒu nèi yán

Definitions (Wiktionary)
  1. noun
    stomatitis
  2. noun
    mouth ulcer; canker sore; aphthous ulcer
    (syn.) 口腔溃疡, 口腔潰瘍, 口疮, 痱滋, 口瘡