Increased bronchial secretions

Bronchial secretions consist of glandular secretions induced by vagus nerve and parasympathetic drugs, and local stimulation of goblet cells to produce secretions. The total amount of secretions is difficult to measure, but under normal circumstances is about 10-100ml per day. The mucus forms a layer on the surface of the trachea, which not only plays the role of humidifying the air, but also limits the evaporation of water in the trachea and bronchi. This layer of mucus film is about 5 μm thick, and it can carry fine foreign particles out of the airway. Increased bronchial secretion is a pathological change of bronchitis. Tracheitis is inflammation caused by damage to the tracheal mucosa, such as viral or bacterial infections, physical, chemical irritation, or allergic reactions. It often occurs during cold seasons or sudden changes in temperature.