It's an inflammation of the stomach and intestines caused by a virus or bacteria. Gastroenteritis usually starts with vomiting, low-grade fever, stomach fullness and painful bloating. Sometimes there might be symptoms of an upper respiratory infection.
Acute gastroenteritis is spread by contact with infected stool.
Therefore, hand washing is very important to keep it from spreading. Wash your hands after every diaper change, after using the bathroom, and before eating or cooking. Your doctor will determine how dehydrated your child is by evaluating his weight loss, laboratory studies, and general appearance. Depending on laboratory results, these fluids may be changed several times. Your child may not be allowed to eat or drink anything for several hours so her stomach and intestines have time to rest.