Children with acute gastroenteritis all have different degrees of gastrointestinal symptoms, which are manifested by reduced appetite, reduced water intake, increased diarrhea, and increased water loss, which can lead to different degrees of dehydration symptoms and the need to drink water. However, drinking water without replenishing electrolytes is not enough, because not only water but also electrolytes, such as potassium and sodium ions, are lost, so you should drink oral rehydration salts. If you can buy hypotonic oral rehydration salt, it is the most suitable for children to rehydrate, because the osmotic pressure of hypotonic oral rehydration salt is relatively low, and it is easier for children to absorb more water and electrolytes through the gastrointestinal tract, which can quickly improve the symptoms of dehydration in children. In addition, it can shorten the duration of symptoms such as diarrhea and vomiting caused by acute gastroenteritis.