New crown diarrhea and common diarrhea are generally asymptomatic and can be distinguished by etiology and epidemiologic history. 1. Etiology: The symptoms of diarrhea caused by neocoronavirus are caused by the patient’s infection with the new coronavirus. In contrast, most common diarrhea is caused by unhygienic food, cold abdomen, improper diet, and intestinal inflammation. 2. Epidemiological history: diarrhea caused by the new coronary is due to the patient and the new coronary patients have a history of contact or have been to the new coronary virus infected area, ordinary diarrhea without the new coronary virus contact history. If it is desired to determine if the diarrhea is caused by infection with a novel coronavirus, nucleic acid testing is required. If neocoronavirus infection is confirmed, immediate reporting to local authorities and self-isolation are required to minimize the chance of transmission. Diarrhea causes the body to excrete excess water and potassium, so it is important to replenish water and potassium. If severe diarrhea occurs, it is necessary to go to the hospital and be treated under the guidance of a doctor, as untreated diarrhea may have serious consequences such as dehydration shock.