Dumb voice with white phlegm may be associated with laryngitis, colds, bronchitis, etc., and you should consult a doctor in time to find out the cause of the disease. 1. Laryngitis: caused by rhinovirus, adenovirus and other infections, due to inflammation stimulation of the vocal cords congestion, edema, speaking on both sides of the vocal cords can not be completely closed in the middle of the leakage of air, which will lead to the patient’s voice mute white sputum. 2. Colds: caused by various bacterial and viral infections, inflammatory stimulation can cause mucosal edema and obstruction of the respiratory tract, thus inducing cough and phlegm, long-term cough can lead to a mute voice with white phlegm performance. 3. Tracheitis: trachea and bronchus due to viral or allergic substances stimulation, mucosal edema can occur, accompanied by ciliated epithelial cell damage, shedding mucus glands hypertrophy and hyperplasia, resulting in coughing mucous phlegm, phlegm thick can be white. If the cough lasts for a longer period of time, a muffled voice may appear. Patients with a muffled voice with white sputum, need to go to the hospital in time, clear the cause of the standardized diagnosis and treatment.