Canker Sore remedy using Baking Soda... ~ M got a canker sore and we did this before bed. Helped a ton. It was almost gone in the am. I add few drops of tea tree oil to my mouthwash and I am age 72 and have healthy gums.
Have not had a Canker Sore in years. But I remember getting them a lot as a kid during the summer after eating tomatoes strait out of the garden. Use to put Alum on them. Gone in a day or two. Careful as it smarts a lot and is very tart.
Canker Sore Cure... Simply dab some baking soda on your finger, then apply it directly to your canker sore. Tastes icky, but it will send those canker sores packing! You may need to apply it a few times per day, but your canker sores will be gone in a jiffy!
DIY Canker Sore Relief - A Home Remedy - Kid Friendly Things To Do .com