"l will quickly brush my teeth"...then wack with the toothbrush on the gum. Then you either gasp or yell but often continue after a few moments.

The damage is done and within 24 hours you will notice discomfort in the form of a mouth ulcer...etc.  In this instance you should spray Sormouth onto the effected area.

Apply before a sore develops for best results.

The travel size Sormouth allows for easy use on the way to work.