The 2 year old’s gastrointestinal tract is still poorly functioning and at the same time has low resistance to external infections, making them susceptible to acute gastroenteritis, the cause of which should be promptly identified at the hospital for appropriate treatment. The common causes of acute gastroenteritis are generally viral or bacterial infections, gastrointestinal dysfunction, digestive function decline caused by damage to the gastrointestinal mucosa, the main manifestations of nausea, vomiting, abdominal pain, diarrhea, fever and other symptoms. Treatment 1, the cause of treatment: caused by indigestion, you can adjust the diet and take lactase, yeast tablets, etc.; if it is caused by bacterial infection, you should choose sensitive antibiotic treatment, such as cephalosporin or penicillin drugs oral or intravenous drip; 2, symptomatic treatment: temperature higher than 38 ℃ can use antipyretic drugs to lower the temperature, such as Merlin, Tylenol; children vomiting, diarrhea, excessive water loss, to timely replenishment of water and Electrolytes. The use of the above drugs should be done under the guidance of professional doctors. The child’s diet should be based on light and easily digestible food, such as millet porridge, noodles or lactose-free milk powder; reasonably regulate the child’s diet and avoid eating unclean food; pay attention to climate change and avoid getting cold in the abdomen to prevent infection.