Children often mute voice, consider with the usual habits related, may also be the emergence of vocal cord lesions, laryngitis and other diseases. 1. Habits, if the children often like to shout or cry, may lead to throat stimulation, and therefore will appear often mute symptoms. 2. Vocal cord lesions, if the children have vocal cord lesions lead to vocal cord congestion and edema, may appear often mute symptoms. 3. Pharyngitis, if children have pharyngitis, the throat is congested and edematous, increased secretion, may appear this symptom. Children often mute voice, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.