What is bronchitis?

What is bronchitis?

What is bronchitis?

Bronchitis refers to chronic, non-specific inflammation of the trachea, bronchial mucosa, and surrounding tissues. The main cause of bronchitis is the repeated infection of viruses and bacteria to form chronic non-specific inflammation of the bronchi. When the temperature drops, the small blood vessels in the respiratory tract, ischemia, and the decline of defense function are conducive to disease; chronic stimuli such as smoke dust and pollution of the atmosphere can also occur; smoking causes bronchospasm, mucosal variation, ciliary movement, and mucus secretion to increase infection; Factors also have a certain relationship.