There are differences between ordinary diarrhea and new crown diarrhea in terms of whether they are contagious, diagnosis, and treatment. 1. Whether there is contagious: new coronavirus pneumonia is a contagious disease, may show abdominal pain, diarrhea, nausea, vomiting, relevant data show that new coronavirus pneumonia has some patients feces is contagious. And ordinary diarrhea is only the symptoms of diarrhea, abdominal pain and bloating, not infectious. 2. Diagnosis: If it is ordinary diarrhea, it can be determined through routine stool examination. But diarrhea caused by new coronavirus infection needs to do stool examination, and also need to do nucleic acid test. Diarrhea caused by new coronavirus infection has a history of close contact before diarrhea, while ordinary diarrhea does not have a history of contact. 3. Treatment: Treatment varies. The main treatment measures for diarrhea of new crowns are antiviral and other treatments, while ordinary diarrhea requires anti-infection and correction of dehydration and electrolyte disorders. Suspected new crown may be diarrhea patients, it is recommended that the nucleic acid test, to avoid missed diagnosis. Tip: “New coronary pneumonia, new coronary virus pneumonia” mentioned in this article has been renamed to “new coronary virus infection” on December 26, 2022, as announced by the National Health Commission.