When should i go to the hospital for vomiting?

When you decide to. Many can settle this process by distraction, sucking ice chips or taking sips of a sweetened drink over ice chips. If you can retain enough fluid to pee every 8 hrs & function okay you can wait. It may gradually improve & let you take & retain bigger volumes. If you can't keep anything down & haven't peed in over 8 hrs, go in.