If you vomit during the night, it is important to take care of yourself afterward. First, rinse your mouth with water or mouthwash to eliminate the taste. Then, drink a clear liquid like water or ginger ale to rehydrate yourself. Avoid dairy, caffeine, and alcohol, as they can make you feel worse. If you can't keep anything down, try sucking on ice chips or popsicles. If you vomit more than once, call your doctor.