Vomiting due to bad stomach is in the majority of cases gastrointestinal bacterial food poisoning, which is an acute infectious toxic disease caused by eating food contaminated with bacteria and their toxins. Patients are advised to go to the hospital emergency room for general treatment as well as symptomatic treatment. I. General treatment: Patients should rest appropriately, and if the symptoms of vomiting and diarrhea are severe, they should be temporarily fasted from food and water. After the symptoms improve, give an easily digestible liquid diet or semi-liquid diet. Symptomatic treatment: 1. For patients with severe abdominal pain and vomiting symptoms who cannot eat, scopolamine can be injected intramuscularly, or belladonna tablets can be taken orally as prescribed by the doctor; 2. For those with fever and systemic toxicity symptoms, or those with frequent vomiting, diarrhea and cannot eat, glucose saline, glucose solution or Ringer’s solution can be supplemented intravenously; 3. The amount of rehydration is generally fast and then slow, and the amount of rehydration depends on the degree of dehydration and can be up to 3000-6000ml; 4. If accompanied by acidosis, it is necessary to supplement sodium bicarbonate and pay attention to monitoring the serum ion level to avoid hypokalemia. Those with mild symptoms of gastrointestinal bacterial food poisoning generally do not need antibiotics. If there is high fever, poisoning symptoms and severe vomiting and diarrhea, antibacterial drugs can be selected. The more commonly used oral drugs are norfloxacin and ciprofloxacin, which need to be used under the guidance of professional physicians, or amikacin and gentamicin intravenous drip or intramuscular injection, and the course of the disease is mostly over within 1-3 days. In the case of Salmonella spp. infection, the course of illness can be as long as 1-2 weeks. In addition to gastrointestinal bacterial food poisoning, symptoms such as vomiting and diarrhea can also occur in bacterial dysentery, cholera, non-bacterial food poisoning, and hemorrhagic necrotizing enterocolitis, and the identification of these diseases needs to be done in a regular hospital. Therefore, when severe vomiting symptoms occur after eating bad stomach, it is important to go to a regular hospital for timely treatment to avoid missing major diseases.