What happens when you try? Do you throw it up? If that is the case then dont eat or drink anything for about 4 or 5 hours after last vomit. Then start on SIPS of clear liquids.. Do not eat any dairy products.... they will spoil in an upset stomach and you will puke again. If you can tolerate sips of clear liquids then move up to BLAND food. Plain toast. saltines stuff like that.... If you can tolerate that then move on to more stuff.... just do it slowly.