If you have diabetes, you can eat the same foods others eat when they have an upset stomach. The key is to monitor the amount of carbohydrate in your meals and snacks, which is listed on all foods that have labels. Most diabetics should limit total daily carbohydrate intake to 200 g or less, according to National Institutes of Health online medical encyclopedia Medline Plus. That total includes carbohydrates from sugar, starch, grains and fiber.
Grains
When your stomach is upset, bland or salty grains may help relieve your symptoms. Examples of suitable grains include pretzels, saltine crackers, dry toast, plain brown rice and plain oatmeal. For blood glucose control and relief of upset stomach, eat several smaller meals throughout the day instead of fewer large meals. A total daily carbohydrate limit of 200 g equates to about 40 g spread over five small meals and snacks. Your doctor or dietitian may have advised you to eat more or fewer grams of carbohydrates each day. If so, simply divide your total over the number of meals and snacks you eat each day.
Fruits and Vegetables
Fruits and vegetables that are easily digested are OK to eat when you have an upset stomach. Some examples are bananas, applesauce and plain boiled potatoes. Fruits and vegetables contain carbohydrates from starch, sugar and fiber that should be counted toward your limit. However, since fresh fruits and vegetables are often sold without food labels, it's harder to know how many carbohydrates they contain. A boiled, skinless potato that is about 2 inches in diameter contains about 25 g of carbohydrate, according to Carbohydrate-Counter.org. A 6-inch banana contains about 23 g and 1/2 cup of canned, unsweetened applesauce has about 14 g of carbohydrates.
Beverages
Clear beverages and soup broth are OK to drink while you have an upset stomach. As with solids, pay attention to the amount of carbohydrates in each beverage. Ginger is a natural and effective remedy for nausea and upset stomach. Use fresh ginger to make a sugar-free tea that you can drink hot or cold. Peel and slice 2 tbsp. of fresh ginger. Steep the ginger in about 6 oz. of hot water, then either strain the liquid or drink it with the ginger. Do this every three to four hours as needed for upset stomach. If you prefer, you may chew 1/4 oz. of fresh peeled ginger.
Proteins
Include proteins in each meal or snack to prevent your blood glucose from dropping too low, too quickly. Choose proteins that are low in fat or fat-free to avoid aggravating your upset stomach. Remove the skin from poultry and trim any visible fat from meat. Do not add any fat or oils during cooking. Use grilling, broiling or boiling to prepare fish, meat and poultry. Since spicy foods may upset your stomach, make your proteins as bland as possible, such as plain boneless, skinless chicken breast or fresh baked fish fillets.
