Getting rid of canker sores is actually very easy. Canker Sores are nothing more than a tiny ulcer in your mouth, and the way to treat ulcers is to treat the acid in the stomach. So we have to treat the ulcer in your mouth in a similar manor. A sure fire cure for them is to mix a paste out of a small spoonful of baking soda, and a tiny bit of water. Make sure it’s thick, yet pliable so you can spread it. Then gather some on your finger, and smear it gently all over the affected area. Try to make sure you keep your tongue off it, and let it stay there for as long as you can stand, before gently flushing your mouth with water. Repeat after meals and right before bed, and right as you wake up, and it will be gone almost that very day.