Novel coronavirus can cause diarrhea. Novel coronavirus infection causes inflammatory exudate in the lungs, which is an infectious disease. Patients with novel coronavirus do not have the same symptoms, some patients have no specific clinical manifestations, only positive test for novel coronavirus, this patient is clinically known as asymptomatic novel coronavirus pneumonia patients; some patients will appear fever, fatigue, body discomfort; other patients will appear high fever, nausea, vomiting, diarrhea and other symptoms; patients will also appear cough, cough sputum, whole body muscle aches and pains, Patients may also experience cough, coughing, and whole-body muscle aches and pains. Therefore, the clinical symptoms of patients with novel coronavirus pneumonia are not identical, with some having mainly respiratory symptoms and others having mainly gastrointestinal symptoms. Therefore, patients with high suspicion of novel coronavirus must be tested for nucleic acids or antibodies.