If there is no abnormality in the mental status and fecal routine of adults, it suggests that the diarrhea is not serious; if there is abnormality, it suggests that there is an organic problem and intervention is needed. 1. Mental status and fecal routine are normal: when diarrhea occurs, nutrients that have not been fully digested and absorbed will be excreted with the stool, including proteins, sugars, etc., so the stool will not be shaped, accompanied by foam. Considering that the diarrhea is caused by cold abdomen or cold food, pay attention to keep warm, or take Montelukast to relieve the diarrhea. 2. Abnormal mental state and fecal routine: If the mental state is depressed after diarrhea, or accompanied by abdominal pain, nausea and other symptoms, fecal routine leukocytosis, etc. Considering intestinal infections, antibiotic treatment such as amoxicillin can be used with rehydration therapy. Diarrhea, stool with foam, it is recommended that timely medical perfect examination, symptomatic treatment.