Thanks for asking me this question. First you have to modify your diet. Avoid gaseous foods like cabbage, culiflowaretc. Do regular exercise more than 30 minutes. Take more fruits and green vegetables. Eat more fibers food. You can use ginger in your diet that help in digestion. Garlic that is best for reducing gas. Avoid fatty foods and oily foods. Don t take junk foods. Drink more water. Avoid alcohol and smoking. Law salt diet helpful for digestion of foods. Don t sleep immediate after meal. After taking this much care still there is present of stomach ptoblem than consent gastroenterologist. In simple gastritis may cause abdominal bloting. Antacids helpful in these case. Take care. Thanks.