Food Allergy
You may experience intense pain in the stomach after eating a food you are allergic to. Examples of these food items include, shellfish, peanuts, walnuts, eggs, etc. Maintaining a food diary is the best way to identify foods causing these symptoms. Write the details of food items you eat throughout the day in this diary. After a few days, you will be able to recognize whether a certain food item or type of food is causing stomach pain.