There are many causes of sour mouth, such as digestive diseases, oral hygiene, etc. For different causes, choose to take different treatment measures. 1. If the acidity is caused by oral hygiene problems, timely cleaning of the mouth can be relieved. If the acidity is caused by eating sweets, there is no need to treat it and it can be relieved by rinsing the mouth in time. 2. If it is a digestive system diseases, such as gastritis, gastric ulcer and other diseases, caused by acid in the mouth, to the treatment of the primary disease, you can take oral cephalosporin, levofloxacin and other drugs for treatment. The choice of specific drugs needs to be based on the clinical symptoms of the specialist doctor to make a comprehensive judgment. The treatment of sour mouth is recommended to go to a regular hospital in a timely manner, to clarify the cause of the disease, under the guidance of a professional doctor, so as not to delay the condition, the use of drugs need to comply with the doctor’s instructions.