Vomiting in one and a half year old babies may be caused by norovirus infection, acute gastritis, meningitis, etc. Common treatments include general treatment and medication. 1. Norovirus infection: clinical symptoms mainly include nausea, vomiting, diarrhea, fever, anorexia, etc., can follow the doctor’s instructions to use montelukast, bifidobacteria, bacillus boulardii, treatment. Usually pay attention to dietary hygiene, avoid raw seafood and so on. 2. Acute gastritis: the onset of acute, mild only loss of appetite, belching, abdominal pain, nausea, vomiting; severe cases can appear vomiting blood, black stools, dehydration, electrolyte and acid-base balance disorders, bacterial infection is often accompanied by fever and other symptoms. Attention to light and easy to digest diet, intravenous fluid to correct dehydration, follow the doctor’s instructions to apply cimetidine, omeprazole and other drugs. If necessary, endoscopic hemostasis. 3. Meningitis: can be caused by bacterial and viral infections, when the patient’s intracranial pressure increases, there will be symptoms of vomiting, the patient can follow the doctor’s instructions to use aciclovir, ganciclovir, penicillin, chloramphenicol, vancomycin, chloral hydrate, phenobarbital and other medications, if the conservative treatment is ineffective, but also follow the doctor’s instructions to carry out surgical treatment, such as ventriculostriate shunt and drainage, and so on. There are many other causes of vomiting in one-and-a-half year old babies, so it is recommended to consult a doctor in time to clarify the cause of the disease and then give targeted treatment or therapy. All of the above medications should be used under doctor’s supervision, avoid self-medication.