canker sore、oral ulcer,stomatitisと呼びます。ulceration（潰瘍）のことです。これをcold soreとかchancreとよべはそれはSTD(sexually transmitted disease:性病)の別名ですから注意しましょう。0:01 they are small, extremely painful and can stick around for weeks. we're talking about canker sores. 口内炎
Canker Cover for Canker Sores - A Dentist Reviews
0:01 oh man, I hate it when I get a canker sore, but it's not a core sore, is it? 口内炎は辛いけど、もしかしてヘルペスじゃないだろうな？
Canker Sores vs. Cold Sores: What's The Difference?
0:20 he's thinking, is that a lipstick stain or a beginning of a cold sore? 彼氏は彼女の唇にあるものを見て、口紅？ヘルペス？といぶかっている。
Why We Kiss | We're Wired That Way
0:05 did you know that 1 in 5 adults gets canker sores and they can take up to 3 weeks to heal? 成人の五人に一人が口内炎にかかり、治るまでに3週間かかることがあるってご存知でしたか？
DenTek Canker Cover
