There is inflammation in the respiratory tract, and the kind of symptoms that appear depends mainly on the specific cause of the disease. Generally, if it is a simple upper respiratory tract infection, for a common cold, there can be nasal congestion, runny nose, sneezing, runny nose, accompanied by a mild cough and coughing. In the case of a more serious cold or influenza, symptoms of general weakness, dizziness, general muscle aches and pains, and even drowsiness and coma may occur at this time. For bronchitis, there may be obvious cough and sputum; for bronchial asthma and eosinophilic pneumonia, there may be irritating cough, wheezing, shortness of breath, and even dyspnea; for pneumonia, there may be symptoms of persistent high fever, obvious cough, sputum, chest pain, and chest tightness.