The most common diseases that cause more than diarrhea are acute gastroenteritis, gastrointestinal flu, and functional dyspepsia. In addition, cholera can also appear to have this symptom, but cholera patients usually have a history of close contact with cholera carriers or infected people, so if such a history of contact is excluded, cholera can be ruled out. Acute gastroenteritis and gastrointestinal colds require routine stool tests plus blood tests to clarify, and after diagnosis, anti-infective treatment with drugs such as norfloxacin or antiviral oral solution is required. If infectious diarrhea is ruled out and functional diarrhea is considered, it needs to be treated with drugs such as montelukast. In addition, if the diarrhea is infectious, dehydration and excessive loss of potassium and sodium may occur when the diarrhea is particularly frequent, which requires laboratory tests for ion biochemistry to clarify.