It is ＳＴＡＩＮ, will go away by itself!

来源: 于 2009-12-14 15:32:29 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次
My son had it from 3-5 year old.
因为口腔里的某种酶过多,
but, good thing is the kids will have less 洞than others.