Vomiting in babies may be due to gastroenteritis, intestinal obstruction, encephalitis and other diseases, patients need to follow the medical advice on the cause of treatment. 1. Gastroenteritis: the baby will appear nausea, vomiting, diarrhea and other symptoms, and may also be accompanied by loss of appetite, fever, lethargy and other phenomena. Antibiotics can be used as prescribed by the doctor. Some patients can also be combined with the use of Saccharomyces boulardii, bifidobacteria and other drugs. 2. Intestinal obstruction: Abdominal pain, abdominal distension, vomiting, and stopping of anal excretion may occur, and some patients with serious conditions may be accompanied by sunken eye sockets and muscle weakness. The obstruction can be lifted according to the doctor’s instruction, and saline, potassium chloride injection, amino acid injection can be used to correct the disorders of water electrolyte and acid-base balance. 3. Encephalitis: headache, fever, vomiting, abdominal pain, diarrhea and other symptoms, vomiting is jet-like, some patients may also be accompanied by loss of appetite, increased blood pressure, bradycardia and other conditions. Usually, fever patients need to be treated with antipyretics such as ibuprofen and acetaminophen as prescribed by the doctor, while convulsive seizures can also be treated with anticonvulsants such as phenobarbital and chloral hydrate under the guidance of the doctor. If the child is in a coma, convulsions, increased intracranial pressure, etc., also need to be given 20% mannitol, glycerol fructose and other dehydrating drugs in a timely manner. Parents are advised to take their babies to the doctor for treatment when they have symptoms of vomiting.