Diarrhea can be divided into mild, moderate and severe according to clinical manifestations, mild daily diarrhea <3 times/day, moderate 4-6 times/day, severe diarrhea >6 times/day. 1. Mild diarrhea: not many unformed stools <3 times/day, clinically relevant symptoms are mild. 2. Moderate diarrhea: unformed stools up to 4-6 times per day, some patients will have systemic symptoms. 3. Severe diarrhea: unformed stools 4-6 times per day, and/or body temperature greater than or equal to 38.5 degrees Celsius, accompanied by symptoms such as urgency (discomfort in the lower abdomen, wanting to defecate very much, and a feeling of incomplete defecation after defecation), blood in the stool, or pus cells detected in the stool. The above is the grading of the degree of diarrhea, patients are advised to seek early medical treatment to control the condition, do not delay the condition to cause further development of the disease.