Sour mouth may be oral inflammatory diseases, gastric reflux, etc. Oral inflammatory diseases are generally not drug treatment, gastric diseases can generally take gastric mucosal protector drugs, such as aluminum hydroxide. 1. Oral inflammatory diseases: such as dental caries and periodontal disease, high bacterial content in the mouth, fermentation may produce acid, making the mouth sour, but generally do not carry out drug treatment, more filling treatment or periodontal treatment. 2. Gastric reflux: gastric reflux and other gastric diseases commonly used gastric mucosal protective agent drugs, such as aluminum hydroxide such as alkaline drugs, generally no adverse reactions, the specific medication used under the guidance of a physician. Sour mouth may have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.