Phlegm after frequent talking may be caused by pharyngitis, bronchitis, pneumonia and other diseases. 1. Pharyngitis is a relatively common disease that can cause phlegm after talking, especially chronic pharyngitis, due to the stimulation of the vocal cords by talking more, resulting in inflammation of the throat area, mucosal congestion, edema, increased secretion, which can be manifested as phlegm, and may also appear dry throat, sore throat and other discomforts. 2. Bronchitis, pneumonia, bronchial dilatation, chronic obstructive pulmonary disease, can also lead to phlegm performance, due to bacterial, viral, fungal and other stimulation of the trachea and bronchial tubes, resulting in an increase in secretion, can be manifested as a significant increase in sputum after talking. The specific cause of the disease needs to be determined after timely medical examination.