How to cure mouth ulcer?

Mouth ulcer: If soothing treatments like bathing the area with warm salt water, maalox or glyoxide don't help, see an oral surgeon for diagnosis and treatment which could include a special corticosteroid gel used for mouth lesions.

Curing ulcer: If caused by irritation, such as broken filling, dental Rx required. If caused by one of many bacterial, viral, or fungal infections, should fully heal in <2weeks with no treatment. If not, MUST be examined by your Dentist. If ulcer is sore, raw, talk to your Dentist. There are OTC pain killers, Rx corticosteroids, and/or laser treatments that may help.