Baking soda does not cure canker sores, and medications that are anti-inflammatory, pain relieving, and promote healing are still needed to heal canker sores. Certain ingredients in baking soda may have anti-inflammatory effects, but the effective dose that can work when used is limited and generally cannot achieve the effect of healing mouth ulcers. Mouth ulcers are mostly treated with topical medications, such as medicated films containing surface anesthetics and glucocorticoids, chlorhexidine gargle, Rehabilitation New Liquid, and watermelon cream powder. All of the above drugs should be used under the guidance of a doctor, if the ulcer symptoms are serious, prolonged or recurring, it is recommended to go to the hospital in a timely manner, to determine the cause of the disease and then give targeted treatment.