Whether the appearance of hoarseness is dangerous or not is related to the specific diseases that cause hoarseness of the throat. Some of them are dangerous, such as vocal polyps, acute laryngitis and laryngeal cancer, etc., but some of them may also be caused by physiological factors or psychological factors. 1. Physiological reasons: due to improper use of the voice and lead to edema, congestion of the vocal cords, thus the phenomenon of hoarseness of the throat, which belongs to the physiological phenomenon, generally does not have a dangerous. Emotional tension and anxiety can also cause this symptom. 2. Pathological causes: (1) Vocal polyps: a benign hyperplastic lesion that occurs in the vocal folds, with typical symptoms such as hoarseness and hoarseness, large polyps are hoarse and can block the vocal folds, causing inspiratory laryngeal stridor and dyspnea. (2) Acute laryngitis: a common acute respiratory tract infectious disease caused by viral and bacterial infections, which can cause hoarseness and dyspnea and other symptoms, which is dangerous. (3) Laryngeal cancer: a kind of malignant tumor that occurs in the larynx, its early symptoms can also appear hoarse voice phenomenon. It is recommended to find out the cause of hoarseness and actively cooperate with doctors for treatment.