Dumb throat and cough with phlegm are common in allergic laryngitis, chronic pharyngitis, reflux pharyngitis and other diseases. 1. Allergic laryngitis: If you come into contact with allergy-prone substances, resulting in an allergic reaction of the mucous membrane of the pharynx, you will have the symptom of mute throat and cough with phlegm. 2. Chronic pharyngolaryngitis: repeated episodes of acute inflammation and stimulation by adverse physical and chemical factors can cause edema and hypertrophy of the mucous membrane and submucosal tissues of the pharynx, increased nerve sensitivity and glandular secretion, and inflammatory factors can cause irritation in the throat, leading to the symptoms of a muffled throat and coughing up phlegm. 3. Reflux laryngitis: The reflux of stomach acid causes irritation to the throat area, which can also lead to the phenomenon of mute throat and cough with phlegm. The body of such discomfort, it is recommended to go to the hospital in a timely manner for examination, a clear diagnosis and follow the doctor’s instructions to standardize the use of medication and treatment, to avoid the development of a more serious condition.