The typical symptoms of novel coronavirus infection include fever, malaise, dry cough, and gradual onset of dyspnea, with some patients having a mild onset of symptoms or even no obvious fever. In a small number of critically ill patients, the disease progresses rapidly and acute respiratory distress syndrome, septic shock, uncorrectable metabolic acidosis, and coagulation dysfunction may soon develop. However, in addition to the typical onset symptoms mentioned above, some patients have atypical onset symptoms, with one or more of the following as the first symptoms, such as mild poor appetite, fatigue, lack of energy, loss of appetite, nausea, vomiting, diarrhea, headache, panic, chest tightness, conjunctivitis, mild muscle pain in the extremities and lower back, etc.