The most common causes of stomach pain and vomiting acid are as follows: 1, chronic gastritis, gastric ulcer, you can take oral acid-suppressing drugs, such as omeprazole, pantoprazole, etc. to inhibit acid secretion, you can also take oral gastric mucosal protective agents, such as bismuth potassium citrate, colloidal bismuth pectin, etc. to help relieve. 2, reflux esophagitis, reflux gastritis, reflux will lead to acid reflux, resulting in vomiting acid, you can take oral Moxa 3, poor eating habits, such as often do not eat breakfast, often eat late night meals, overeating, etc., can also lead to stomach pain, vomiting acid, it is recommended that three meals a day regular diet. 4, the diet structure is not reasonable, such as often drink alcohol, eat cold, greasy, spicy stimulating food more, may cause this symptom, it is recommended to eat more mild, less stimulating food to improve Symptoms.