Chronic pharyngitis is not accompanied by rusty sputum, and the attack of chronic pharyngitis is characterized by dryness and itching in the throat. The main manifestation of chronic pharyngitis is dryness and itching in the throat, tingling, and a feeling of phlegm adhesion, and the amount of phlegm is small and sticky. If rust-colored sputum occurs, it is mainly caused by bacterial infections of the respiratory system, mostly lobar pneumonia caused by pneumococcal infections. If a large amount of rust-colored sputum occurs, it is recommended that you should go to the respiratory medicine department of a regular hospital in time to have a chest X-ray and a chest CT examination, and carry out anti-inflammatory treatment in time to avoid more damage to the respiratory system.