Vomiting and diarrhea in 2-year-old children may be related to gastrointestinal dysfunction, gastrointestinal infection, food poisoning and other factors, which need to be treated symptomatically after clarifying the causes. Common causes: 1. Gastrointestinal dysfunction: If improper diet, eating too much greasy, cold, spicy, irritating food, or cold stimulation of the abdomen may lead to indigestion, causing gastrointestinal dysfunction, vomiting and diarrhea symptoms; 2. Gastrointestinal infection: Due to eating unclean or spoiled or rotten food, resulting in bacterial or viral infections, such as Escherichia coli, salmonella, rotavirus, norovirus, etc., epigastric pain, diarrhea, nausea, vomiting and diarrhea may occur. Norovirus, etc., can appear epigastric pain, diarrhea, nausea, vomiting and other symptoms, accompanied by fever and pain; 3, food poisoning: eating food containing toxic substances, such as food contaminated with bacteria and their toxins, poisonous mushrooms, chemical poisons, etc., will appear epigastric vomiting and diarrhea, abdominal pain, fever and other symptoms. Treatment: It is recommended to go to the hospital in time to improve the stool routine, abdominal ultrasound and other examinations, you need to follow the doctor’s instructions for medication, you can fast temporarily, diarrhea more often can be given montelukast to inhibit the peristalsis of the gastrointestinal tract to relieve diarrhea, clear bacterial infection, antibiotics can be given for anti-infection treatment. If the diarrhea is serious, oral rehydration salt or intravenous rehydration is needed to avoid dehydration leading to water and electrolyte disorders, and gastric lavage is needed if necessary for food poisoning. Caution: Pay attention to dietary hygiene in daily life, do not eat spoiled or contaminated food, do not eat food from unclear sources, pay attention to adjusting the diet structure, avoid excessive intake of stimulating food for children, eat regularly, and pay attention to daily warmth.