The course of acute gastroenteritis generally lasts about 7 to 10 days. Patients typically have an acute onset, presenting with abdominal discomfort, nausea, vomiting, and abnormal stools. The abdominal discomfort is usually centered around the navel or the lower abdomen, predominantly characterized by intermittent cramping pain. Vomiting usually occurs more severely after eating and generally involves expelling stomach contents, without accompanying hematemesis or bile, and recurs frequently. Abnormal stools commonly involve more frequent bowel movements, colloquially known as diarrhea. Along with an increase in stool frequency, the stool tends to be looser in texture, and some patients may have watery stools, thus typically it presents as an acute episode. General treatment involves diet adjustment and, when necessary, the addition of some oral medications. Generally, conditions gradually improve over about 7 to 10 days. (Please take medication under the guidance of a professional physician.)