What are the symptoms of respiratory infection ?

Respiratory infection is divided into upper respiratory infection and lower respiratory infection, and their symptoms are different.

The symptoms of upper respiratory infection mainly include nasal and pharyngeal dryness and itching, nasal congestion and rhinorrhea, sneezing, headache, and so on. At the same time, there may be fever, cough, pharyngeal redness, poor spirit, and loss of appetite. The symptoms of lower respiratory infection mainly include fever, cough, expectoration, shortness of breath, chest pain, and so on. There may also be dyspnea, lips cyanosis, and lung abnormalities.

Please note that the above information is for reference only. If you experience respiratory infection symptoms, it is recommended to consult a doctor for professional diagnosis and treatment advice.