Gastritis is the main name used for any condition that involves inflammation of the stomach lining. Gastritis can be either acute (happens all of a sudden) or chronic (happens over time). There are different types of gastritis that are caused by different factors.For most people, gastritis is minor and will go away quickly after treatment. There are some forms of gastritis that can produce ulcers or cause a higher risk for cancer.Your diet is important for your digestive and overall health. What you put in your stomach can make a difference in the health of your digestive system. For instance, some forms of gastritis are caused by drinking alcohol too often or too much at one time. Avoiding some foods and beverages and eating others can help manage the condition.