Long-term hoarseness of the throat is usually considered to be caused by chronic laryngitis, laryngeal nerve injury, and occupational lesions in the throat. 1. Chronic laryngitis: due to long-term excessive use of the voice, drinking too little water, bacterial and viral infections, etc. induced by the vocal cord congestion and swelling, pain, hoarseness and other uncomfortable symptoms. 2. Laryngeal nerve injury: due to neck surgery trauma, neck trauma and other causes of laryngeal nerve injury, hoarseness symptoms. 3. Occupational lesions in the throat: due to occupational lesions such as vocal cord nodules, vocal cord polyps, local tumors, etc., which block the voice in the throat, resulting in pain, hoarseness, dysphagia and other uncomfortable symptoms. Long-term hoarseness of the throat may have other causes, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.