Many medicines for aphthae include borneol (such as Bingpeng Powder) and "Niuhuang Jiedu Tablet".

It is a valuable Chinese medicine (it is better to invite friends to dinner than to watch borneol). You can rest assured to take it (do you still need to wash dishes? ) I pinch a small grain and put it in my mouth. Look!

Of course it won't have any effect on the skin?