Hoarseness may be caused by acute and chronic laryngitis, vocal polyps, vocal cord nodules, laryngeal cancer, vocal cord paralysis and other diseases. 1. Acute and chronic laryngitis: acute and chronic inflammation of the laryngeal mucosa mainly in the vocal folds, resulting in symptoms such as congestion, edema and hypertrophy of the vocal cords, and incomplete closure of the vocal cords during the voice, which manifests the symptoms of hoarseness. 2. Vocal polyps: benign hyperplasia of the vocal folds is known as vocal polyps, and the symptoms of vocal polyps are generally characterized by hoarseness. 3. Vocal cord nodules: tiny nodular lesions occurring on the free edge of the vocal cord, early manifestations of fatigue and intermittent hoarseness, hoarseness aggravated by the development of the disease, which is persistent. 4. Laryngeal cancer: malignant tumor of the larynx, because of violating the vocal cords, it manifests the symptom of hoarseness. 5. Vocal cord paralysis: it refers to vocal cord movement disorder caused by damage to the motor nerve of laryngeal muscle. When the nerve is completely paralyzed, there is hoarseness. Speaking hoarse voice, it is recommended to hospitals, clear causes, in the guidance of professional doctors for targeted treatment.