[header] How to eat the right foods to settle an upset stomach [title] Don't eat while you're actively vomiting or have diarrhea. [step] Wait a while after you stop vomiting or have diarrhea before you try to eat any solid foods. Children should wait at least 6 hours after they stop vomiting before starting solid foods. 
You can usually begin to add bland foods back to your diet the day after you have diarrhea. [substeps] If nausea is a problem in keeping food down, take sure you can keep liquids down for a while before you try eating any solid food.