Vomiting is forceful expulsion of stomach contents through the mouth.
Suck on a hard candy or popsicle. Then progress to ice chips or small sips of water. A sip or two every 10 minutes is a good way to start. If nausea or vomiting recurs, reduce to smaller amounts or take nothing by mouth for an hour or two. Try plain pasta, rice, saltines, toast and jelly, banana, applesauce, broth-based soups.