The symptoms of diarrhea when drinking red beans and barley porridge are mainly considered to be caused by the weakness of the intestines and stomach. Because barley is a cold ingredient with the effect of detoxification, diuretic and dispel dampness, after consumption by people with weak gastrointestinal function, it is easy to stimulate the surface mucosa of the stomach, intestines and other digestive organs, which leads to the functional disorder of the surface mucosa. If a large amount of water and nutrients in the body cannot be absorbed, they can only be excreted from the body in the form of excretion, resulting in abdominal pain, diarrhea, loose stools and other adverse symptoms in such patients. In addition, the possibility of other diseases such as allergic gastroenteritis, irritable bowel syndrome and acute gastroenteritis cannot be ruled out, because the above disease types can have a serious impact on the normal functioning of the human digestive tract and eventually lead to the occurrence of such adverse symptoms.