Interlaryngeal phlegm is usually characterized by a tendency to chirp during breathing when there is thick phlegm in the throat and it is difficult to expel the phlegm. Phlegm chirping can be caused by a variety of reasons, the most common being the presence of phlegm in the airways of people with upper respiratory tract infections caused by a variety of infectious factors, such as acute laryngitis or bronchitis, etc., and can also occur as a result of phlegm obstruction causing acute airway spasms, once detected, it is important to go to the hospital in a timely manner, and to determine the cause of the disease through chest radiographs or CT scanning. Usually, it is necessary to give sputum treatment and anti-infection treatment, if necessary, also need to give nebulization treatment to relieve airway spasm, the relevant treatment should be carried out under the guidance of professional doctors.