If your stomach is unsettled, avoid drinking coffee. It can irritate the stomach, induce heartburn, and worsen conditions like diarrhea and stomach ulcers.
Dairy is also not allowed. Consider the previously listed exclusions, but avoid other dairy products. Lactose, in particular, can worsen stomach issues.
Oranges, lemons, and other citrus fruits are highly acidic, requiring you to process even more acid in an upset stomach.
Spice-rich dishes can stimulate the digestive system, resulting in indigestion. Not to mention that it can be harmful to your stomach lining.
Beans, lentils, and cruciferous vegetables (such as broccoli and cabbage) are difficult to digest. If your stomach is unsettled, avoid these.
Fat is difficult to absorb. In some cases, eating high-fat foods may cause constipation and diarrhea.
Alcohol can irritate the stomach lining, causing increased acidity and inflammation, thus it is best avoided when you have an upset stomach.
High-fat meats, such as bacon, sausage, and fatty steaks, are difficult to digest and may cause stomach pain.