Four-year-old children vomit a lot, drink water also vomit, need general treatment, symptomatic treatment, etiological treatment, such as acute gastroenteritis, anti-infective treatment; intracranial infection, control of cerebral edema, anti-infective treatment; intestinal obstruction, gastrointestinal decompression, surgical treatment; acute poisoning, gastrointestinal lavage diarrhea treatment and so on. 1. General treatment: record the amount of in and out, let the child take one side of the lying position, drink water also vomit, try to let the child fasting, rehydration. 2. Symptomatic treatment: replenishment of fluids to correct water electrolyte disorders, gastrointestinal decompression, relieve abdominal distension, the use of proton pump inhibitors, inhibit gastric acid secretion. 3. Treatment of causes of vomiting: (1) acute gastroenteritis: bacterial infection, use cephalosporin, macrolide antibiotics. Can use bifidobacteria, etc. to regulate intestinal flora, and the use of montelukast and other intestinal mucosal protective agents. (2) Intracranial infection: bacterial infection, use of cephalosporin antibiotics, viral infection, use of acyclovir, the use of mannitol to reduce intracranial pressure and so on. (3) Intestinal obstruction: gastrointestinal decompression, enemas for diarrhea, surgery may be needed if symptoms are severe. (4) acute poisoning: such as food poisoning, wild mushroom poisoning, need to wash the stomach, diarrhea, symptomatic treatment. The child vomited a lot, timely visit the hospital, let the doctor guide the treatment.