Acid in the mouth and the desire to vomit are mainly considered to be caused by bile reflux gastritis, reflux esophagitis, gastric ulcer and other digestive system diseases. If a woman of childbearing age is pregnant, this condition may also occur. If a woman’s pregnancy reaction can be ruled out, it is best to go to the hospital for a timely checkup after this symptom occurs. If the test is reflux esophagitis, you can take oral omeprazole, mosapride and other drugs to treat it, the specific medication must follow the doctor’s advice. You can also eat more foods that protect the gastric mucosa, inhibit stomach acid or neutralize stomach acid, such as milk, steamed bread, noodles, tomatoes, peanuts and other foods, and develop good eating habits to avoid the symptoms of stomach acid reflux for a long time.