Bronchitis can cause pharyngitis, an inflammation that occurs in the pharynx and can be caused by infectious factors, such as bacteria, viruses, fungi, mycoplasma, chlamydia, etc., or by non-infectious factors, such as allergic reactions, smoke irritation, harmful gases, etc. Bronchitis is an inflammation of the mucous membrane and surrounding tissues of the bronchial tubes, caused mostly by viral infections, but also by bacterial, mycoplasma, and chlamydial infections. The etiology of bronchiectasis is similar, and the same pathogens that cause bronchiectasis can also cause pharyngitis. When bronchitis occurs, most of them show symptoms such as coughing and coughing up sputum. When coughing violently, especially repeatedly over a long period of time, the high-speed airflow from the cough causes strong irritation to the throat, causing congestion and edema in the throat, which manifests as acute pharyngitis. Therefore, bronchitis can cause pharyngitis, and the two interact and are linked.