Zhang Wei couldn't understand why he was suddenly coughing when he had been fine in the afternoon.
Suddenly, he felt an urge to cough, and it was a harsh cough, accompanied by breathlessness, an itchy throat, and even nasal congestion, runny nose, and headaches.
If a doctor were to examine Zhang Wei's symptoms now, they would find that he was suffering from acute bronchitis, which was much more serious than his earlier acute upper respiratory infection.
In Western medicine, acute bronchitis refers to an acute inflammation of the bronchial mucosa caused by viral, bacterial, or other microbial infections, or by physical, chemical irritants, or allergic reactions.
It is often triggered by cold exposure or excessive fatigue weakening the physiological defense functions of the upper respiratory tract and commonly occurs during the sudden climate changes in winter and spring or after overexertion.
In traditional Chinese medicine, this is categorized as a cough.
