If you have stomach pain, vomiting and diarrhea, you should consider acute gastroenteritis and food poisoning. It is recommended that you go to the hospital for examination and treatment of the cause after clarifying the cause. Common causes and treatments 1. Acute gastroenteritis: Mostly caused by eating raw and cold, unclean food, or overeating. In addition to stomach pain, vomiting and diarrhea, patients also have fever, bloating and other symptoms. Routine stool and stool culture tests need to be completed. Those with mild symptoms can be treated conservatively with bed rest as much as possible, and oral glucose-electrolyte solution can be given to replenish body fluids. If the symptoms are severe, with persistent vomiting or obvious dehydration, intravenous glucose saline and other related electrolytes need to be supplemented, and if necessary, antiemetic and antispasmodic drugs such as belladonna tablets and montelukast can be injected. 2. Food poisoning: Food poisoning causes stomach pain and vomiting and diarrhea, which is a protective mechanism of the body itself. It is necessary to take suspicious food, vomit and stool culture to clarify the type of pathogenic bacteria, and then treat according to the culture and drug sensitivity results. In mild cases, conservative treatment with rest and hydration is sufficient. In severe cases, atropine should be injected subcutaneously. Those who can eat should be given oral rehydration, and those who cannot eat with severe vomiting or have frequent diarrhea should be given intravenous drip of sugar saline. In order to avoid the above situation, we need to pay strict attention to food hygiene in our daily life, separate raw and cooked food in the refrigerator, avoid eating raw and cold food, and wash hands before and after meals.