口腔潰瘍 [－－溃疡]

Jyutping hau2 hong1 kui2 joeng4
Pinyin kǒu qiāng kuì yáng

Definitions (Wiktionary)
  1. noun
    aphthous ulcer; mouth ulcer; canker sore
    (syn.) 口内炎, 口內炎, 口疮, 痱滋, 口瘡