Fall diarrhea is mainly caused by rotavirus infection. Many people think that summer is the peak season for gastroenteritis, but the peak season for rotavirus is in autumn, when the temperature is around 20°C. This temperature is very suitable for rotavirus reproduction. Therefore, many children are susceptible to “autumn diarrhea” during this period. Rotavirus is highly contagious and the infection does not decline significantly due to the significant improvement in public health conditions. The main route of transmission is the digestive tract. However, “respiratory transmission” is also possible, and the nutritional status is not closely related to the degree of morbidity. The disease initially presents with cold symptoms such as runny nose, cough, fever, sore throat, and stools several times a day, accompanied by vomiting and abdominal pain, and is easily misdiagnosed as a gastrointestinal cold. Gastrointestinal symptoms are heavy, even the daily stool times up to dozens of times, mostly watery or egg-like, larger children stool is jet-like, no special fishy smell and mucus pus blood. Due to frequent diarrhea and vomiting, and low appetite, children are prone to varying degrees of dehydration, and in severe cases, electrolyte disorders, or worse, life-threatening encephalitis, intestinal bleeding, intussusception or myocarditis. Treatment: I. Drug treatment: 1. Anti-viral: virazole, etc. 2. Symptomatic treatment: Simethicone to protect the gastrointestinal mucosa, antispasmodics to reduce diarrhea. 3, mild dehydration can be oral rehydration salts containing glucose, sodium chloride, sodium bicarbonate, a packet of rehydration salts with warm boiled water into 500ml, divided into several oral doses. You can also make your own sugar and salt water: dissolve 4 spoons of sugar and half a spoon of salt in 1000-1500ml of cool boiled water, mix well and drink. If dehydration is severe, intravenous rehydration is required. Restore the balance of intestinal flora: Since dysbiosis can make diarrhea persist and seriously affect the health of children, it must be treated early under the guidance of a doctor, with medications such as Pepcid and Mammazine. If there is no obvious evidence of bacterial infection in the stool and blood tests, the use of antimicrobials should be avoided, otherwise the condition will be further aggravated. The child’s diet should be regulated, and the lighter one need not fast, but should minimize the number of breastfeeding, stop eating milk, cream of wheat, meat, vegetables and other indigestible foods . You can drink salt water, rice soup, thin rice paste, thin lotus root powder, etc. If the disease is serious, fasting should be 6-24 hours, if the symptoms are relieved after a certain period of fasting, the diet can be gradually resumed. Food must be from little to much, from thin to thick, do not be too hasty. Care: The abdomen should also be protected, because the climate in autumn is gradually turning cooler, and children with this disease are affected by viruses, intestinal peristalsis is already faster, if the abdomen is cold again, intestinal peristalsis will be faster, and diarrhea will increase. The skin and mucous membrane around the anus must be damaged because of the increase in the number of bowel movements, so children should be washed lightly with a soft gauze dipped in water after the bowel movement and then coated with some greasy ointment. Prevention: Prevention is the main focus, keep the “disease from the mouth” gate, develop good hygiene habits of washing hands before and after meals, do not drink raw water, do not eat unclean food. For infants to pay attention to feeding because rotavirus exists in food, so the disease should be breast hygiene, bottles, spoons and other eating utensils should be washed with boiling water before and after each feeding, preferably boiling once a day to disinfect. Do not eat overnight food; mothers should pay attention to the cleanliness of the breasts and change underwear regularly to reduce the chances of infection. Infants’ toys should also be disinfected frequently. infants under 1 year old should have as little contact with outsiders as possible.