This is bloating. Drink lots of water. Avoid Spicy foods. Avoid fatty foods. Avoid oily and fried food. Eat smaller meals . Never remain hungry for long duration . Have 3-4 serving of fruits every day. Never skip a meal. Always have salad with meal. Even if you skip the meals, have some salads.Watch your Caffeine and Tea intake. Reduce Alcohol intake and Smoking. Never lie down after a meal for at least 30 minutes. Reduce weight if obese. Avoid Carbonated drinks. Make sure you dont have Constipation, eat plenty of fibre rich foods, Do exercise for about 30-40 minutes a day. Avoids certain foods like peppers, beans, cauliflower etc. Avoid Meat and Milk.