A scratchy throat and cough with muffled voice may be caused by colds, allergic laryngitis, reflux laryngitis and so on. 1. Colds: early viral colds are usually caused by viruses that irritate the mucous membranes of the upper respiratory tract, often accompanied by fever, runny nose, nasal congestion and other symptoms. 2. Allergic pharyngolaryngitis: mainly caused by contact with allergens, such as eating allergic substances, which leads to a perverse reaction in the throat, there will be an itchy throat, dry cough and other symptoms, and when coughing for a long time, it will lead to damage to the mucous membrane of the vocal cords, thus causing hoarseness. 3. Reflux laryngitis: mainly stomach contents reflux to the throat caused by laryngeal inflammation, the typical symptom is hoarse, may also be accompanied by itchy throat, cough and other symptoms. Itchy throat, cough and mute voice, timely to the hospital, identify the cause of the doctor to take treatment or treatment.