Acute gastroenteritis usually starts suddenly, and the main symptoms are nausea, vomiting, fever, abdominal pain and diarrhea. Vomiting is common in children and diarrhea is common in adults, with the following five main symptoms (1) A history of overeating or eating unclean and spoiled food. (2) Rapid onset, frequent nausea and vomiting, severe abdominal pain, frequent diarrhea, mostly watery stools, which may contain undigested food, a small amount of mucus, or even blood, etc. (3) There are often fever, headache, general malaise and toxic symptoms of varying degrees. (4) In severe cases of vomiting and diarrhea, there may be dehydration, acidosis, and even shock. (5) The signs are not obvious, there is pressure pain in the epigastrium and around the umbilicus, no muscle tension and rebound pain, and the bowel sounds are mostly hyperactive. In addition, headache, fever, chills and muscle pain are also common symptoms. In a few severe cases, dehydration may occur due to frequent vomiting and diarrhea. Early treatment Once you have acute gastroenteritis, you should try to rest in bed and take oral glucose and electrolyte solution to replace the loss of body fluids. Experts point out that dehydration is the main cause of death in norovirus gastroenteritis, so preventing dehydration is the most important aspect. For serious cases, especially young children and the weak should be timely infusion or oral rehydration to correct water, electrolyte disorders and acid-base balance imbalance. It is also important to pay attention to hydration and not just drink plain water. It is best to drink electrolyte water solution with appropriate salt and water. If you drink plain water desperately, I am afraid that it may lead to electrolyte deficiency in the body and cause cramps. You can also buy rehydration salts from pharmacies and take them yourself. While replenishing fluids, you should visit a regular hospital, or you can also take oralloxacin. It should be reminded that after the initial treatment, the acute symptoms of acute gastroenteritis disappear, but it does not mean that the digestive tract function has completely returned to normal, and the dietary treatment is quite important at this time. If you start eating normally after the initial healing of acute gastroenteritis, or even eating greasy and spicy foods or drinking alcohol, the gastrointestinal tract, which has not yet recovered its function, will be overwhelmed with discomfort such as bloating, and some will turn into chronic gastrointestinal diseases, such as chronic gastritis and chronic diarrhea. Generally, within 5-7 days after acute gastroenteritis, according to the different conditions of each patient, the first thing to avoid harmful factors: that is, quit smoking, alcohol, strong tea, coffee, etc. Eat less spicy and rough food, do not overeat, take less drugs that are irritating to the stomach and intestines, etc. Second, the diet advocates three meals a day, each meal should not be too full, do not advocate more meals, so as not to increase the burden on the stomach. The first thing to do is to eat lighter fluid, semi-liquid, such as rice soup, porridge, fresh fruit juice, and gradually increase some protein food, but avoid greasy, fried food, and in the beginning to eat a small amount, and wait for the gastrointestinal tract function to recover, then start a normal diet, and pay attention to rest. The best way to prevent gastroenteritis is to pay attention to hygiene The best way to prevent intestinal viruses is to disinfect them. Contaminated water, food, vomit and feces of infected people are all possible vectors of transmission because the virus enters the human body mainly through the digestive tract. Generally speaking, it can be effectively prevented by paying attention to personal hygiene, washing hands regularly, and keeping raw and cooked food separate in the refrigerator. Eating less raw food and cooking the food before eating is also one of the ways to prevent.