Diarrhea, nausea and vomiting are mostly considered to be caused by acute gastroenteritis, which is caused by gastrointestinal infection. It can be treated with acid suppressants combined with probiotics, such as oral omeprazole or lansoprazole and other proton pump inhibitors, combined with probiotics such as Clostridium typhimurium tablets or Bacillus subtilis capsules, the symptoms of diarrhea, nausea, vomiting and abdominal pain can be significantly relieved. If you are a woman of childbearing age, you must first rule out early pregnancy, ask about your menstrual history, and check your HCG if necessary, and if you are an elderly patient with nausea and vomiting, you must rule out organic heart disease and have an electrocardiogram done first.