Children vomiting and diarrhea are mainly caused by indigestion and gastrointestinal infections. It is recommended to consult a doctor promptly and deal with them according to the doctor’s advice. Common causes 1, indigestion: generally caused by external stimuli or improper diet, such as cold stomach, overeating, etc. Due to the weak gastrointestinal function of children themselves, it is difficult to digest food, which may also cause vomiting and diarrhea; 2, gastrointestinal infection: gastrointestinal viruses and bacterial infections, stimulating the contraction of the gastric mucosa, resulting in increased intragastric pressure, causing vomiting, inflammatory response stimulates smooth muscle spasm contraction, accelerating intestinal contents excretion, causing diarrhea. Treatment 1, daily care: fasting for 4-6 hours, so that the stomach and intestines fully rest, appropriate hot water, more massage, hot compress abdomen, promote gastrointestinal peristalsis; 2, antibacterial treatment: according to drug sensitivity test, use antibiotics as prescribed by the doctor, such as cefaclor; 3, symptomatic treatment: can be prescribed to use montelukast to stop diarrhea, to protect the gastrointestinal mucosa; with the use of lactobacillus, regulate intestinal flora. Parents should pay attention to the child’s diet, mainly easy to digest diet, such as thin porridge, noodle soup, etc.. Ensure clean and hygienic diet, forbid eating raw and cold food, pay attention to rest and keep warm, and consume probiotics appropriately to promote gastrointestinal motility.