can you give her something with electrolytes - smartwater or pedialyte? those are easier on your stomach than straight water.
I've had nausea last 24 hours after GA, don't know if that's normal. I would call either her pediatrician or whoever did the surgery. I hope it stops soon
---------- Post added at 12:41 PM ---------- Previous post was at 12:39 PM ----------
oh and bland but salty snacks - when my kids are puking, salty snacks tend to stay down the best. during our last big stomach bug here (rotovirus) goldfish stayed down with my 3yo, for instance...I've had pretzels and saltines also work well.