The throat is not red generally means that the mucous membrane of the throat is not congested, the mucous membrane of the throat is not congested, no pain in the throat, speak in a small voice may be caused by chronic laryngitis, vocal polyps, vocal cord paralysis and other diseases. 1. Chronic laryngitis: mostly seen in teachers, merchandising and other groups, chronic laryngitis in the nose, sinuses, tonsils and other neighboring parts of the inflammation, excessive use of voice, after the onset of the patient can be due to the mucous membrane of the vocal folds, edema, and the appearance of a very small voice, and can be accompanied by or not accompanied by the mucous membrane of the pharynx is congested, sore throat and other phenomena. 2. Vocal cord polyps: refers to benign lesions occurring in the vocal folds, patients with vocal cord polyps will have voice changes, such as hoarseness, roughness, and there will be a weak voice, easy to fatigue, and even the phenomenon of loss of voice, in addition, the patient can be due to the polyp blockage of the vocal folds, and there is difficulty in breathing, and there is no congestion of the mucous membrane of the pharynx, not accompanied by sore throat. 3. Vocal cord paralysis: mainly due to the laryngeal motor nerve damage or compression of the vocal cord movement disorder, vocal cord paralysis patients usually appear to speak in a small voice, and the mucous membrane of the throat is not congested, not accompanied by sore throat. In addition, there are many other causes can be caused by the throat is not red and not painful, speaking voice is very small, it is recommended to go to the hospital in a timely manner to consult, clear the cause of the disease, as soon as possible to receive treatment.