Mouth Sores And Ulcers - 5 Best Home Remedies to Get Rid of Mouth Ulcers And Canker Sores Overnight

Baking Soda. Baking soda is an alkaline and will neutralize acids that irritate the canker sore it also helps kill bacteria to help your sore heal quickly. For a cure, try this home remedy: Rinse your mouth with a solution of 1 teaspoon baking soda in 1/2 cup of warm water.