In general, clinical symptoms of food poisoning can appear 2-5 hours after eating, and in slow cases, the onset may be 0.5-1 day. Food poisoning is usually caused by bacteria, fungi and toxic chemicals that contaminate food and cause clinical symptoms after it is consumed by humans. The main clinical manifestation of the patient is gastrointestinal symptoms, the patient will have nausea, vomiting, dizziness, headache, abdominal pain, diarrhea, and even an increase in body temperature, and severe symptoms will cause severe vomiting and lead to shock, metabolic disorders and other comprehensive symptoms. Therefore, once these problems occur, you need to actively go to the hospital for treatment, you need to give gastric lavage, diarrhea, and hydropower support to maintain the water-electrolyte balance to prevent shock, and if necessary, you need to give antibiotics and other symptomatic treatment. If you have eaten food contaminated with bacteria, you can come to the hospital for treatment, use antibiotics to antagonize the production of bacteria, and give rehydration, usually 1-2 days to recover. If you have eaten food that contains toxicity, you should be sent to the hospital in time to receive comprehensive rescue treatment.