The main manifestation of novel coronavirus pneumonia is that the patient may feel tightness and shortness of breath in the chest, which may become more severe after activity. In a natural state of life, the patient may feel that he or she is not breathing enough and may naturally take deep breaths or breathe faster. In this case, the oxygen level of the fingertip will be lower than 95% of normal. This kind of dyspnea indicates severe or critical illness and requires early intervention to stop the further development of the disease. An increase in dyspnea can become acute respiratory distress syndrome, and in severe cases, shock, sepsis, respiratory failure, or even life-threatening.