Now listen very carefully. Put the candle back!
Oops. Wrong thread.
Nausea: after you rinse or perhaps brush the orifical appendage of concern,
Pour hydrogen peroxide into a small glass. A shot glass would work, if you promise not to drink that shot.
Next: use an absorbent material to soak the peroxide up into the cotton ball/Q-tip/clean sock/tighty whites/TP.
Gently rub the canker on the side of the tongue with the peroxide, or just soak that area with the peroxide for 15 seconds.
That will diminish the swelling afterwards.
Fill your mouth with available water, (tap will do, not toilet).
Swish then spit. Repeat. (Also, "swish" does not mean to prance about like Buffalo Bill: no one needs to see that on Skype again.)
After a fifteen minute period of time, Kentucky Deluxe awaits!
Trust me on this.