30 Best Foods For An Upset Stomach. Everyone would probably agree that having an upset stomach is the worst. An upset stomach greatly disrupts quality of life until symptoms are resolved. Whether you have got nausea, vomiting, diarrhea, or constipation, there are a variety of foods that can help ease and even cure an upset stomach. No matter your symptoms, choosing the right foods to help ease instead of exacerbate your pain.An upset stomach can be caused by a variety of things such as a virus, food poisoning, eating or drinking too much, or a food allergy. The main thing to remember any time you are having stomach problems is to stay thoroughly hydrated. This means drinking plenty of clear liquids, and avoiding alcohol and caffeine.If you are experiencing nausea, vomiting, or diarrhea, it is best to stick to bland foods. Try to avoid fatty foods or dairy as these can make your symptoms worse. On the other hand, if you are experiencing constipation, try to stick to fibrous foods, while making sure you are drinking plenty of water.Here are some foods you can stock up on, that address the unpleasant symptoms of an upset stomach. Many of these are pantry staples, so they are easy to keep on hand for the next time you are not feeling well.