As I have described gastritis and stomach ulcers in THe Key to Health and Rejuvenation, it is not really the stomach that is causing this problem, but what moves into it from below. Destructive bacteria colonize the stomach only when there is something for them to do. Intestinal congestion leads to backflushing of waste, toxins, bacteria, etc. from the colon all the way up the stomach and further. This may also lead to regurgition of bile -- one of the most common cause for indigestion, heart burn and other forms of stomach upset. To help this problem, the liver bile ducts need to be thoroughly cleansed, and the colon must be kept clean as well (see THe Amazing Liver Cleanse for details). A balanced diet and lifestyle, of course, plays a major role in this, as you have noticed yourself. In acute gastritis, there are no real magic bullets, although, drinking extra amounts of water, some mint tea, and cayenne pepper can bring relief.