how to make canker sores go away fast
1 A baking soda paste is another tried and true remedy to quickly make your canker sore feel better. 2  Mix a little baking soda and water and apply it to your sore. 3  Try not to eat or drink anything for about half an hour.ere are some tips. 1  Dab on some Alum Powder. 2  This old-time remedy has been passed down from generation to generation because it seems to work. 3  You can find alum in the spice section of the grocery store. 4  It is a white powder used to keep pickles crisp. 5  Wet a Q-tip then dip it in the alum; take care not to get too much.