Singing phlegm may be suffering from chronic pharyngitis, chronic laryngitis, bronchitis and other diseases caused by excessive vocal stimulation of the local mucous membrane secretion increase. You need to take medication for the cause. 1. Chronic pharyngitis: When you suffer from chronic pharyngitis, singing will stimulate the pharynx and result in more sputum. Patients need to follow the medical advice to use boric acid solution, furacilin solution and other gargles to clean the mouth. 2. Chronic laryngitis: If you have chronic laryngitis, singing will also lead to more phlegm. Patients need to take oral medications such as Ambroxol and Bromhexine under the guidance of a doctor to reduce phlegm. 3. Bronchitis: Patients with bronchitis will cough up phlegm, which may increase after excessive use of voice. Patients can take oral dextromethorphan, pentoxyverine and other cough suppressants, or oral aminoglutethimide and other expectorant drugs as prescribed by the doctor. If the patient has more phlegm after singing, he can go to the hospital in time to find out the cause of the disease and actively cooperate with the doctor to take treatment measures to avoid aggravating the condition.