The causes of vocal cord paralysis include bacterial infection, nerve dysfunction or tumor compression, whether it is permanent or not should be analyzed according to the cause of the disease. 1. After bacterial infection, the inflammatory factor will stimulate the vocal folds and cause paralysis of the vocal folds. Timely and standardized anti-inflammatory and anti-infectious treatment can often restore the paralysis, which is temporary. 2. Neurological disorders may cause paralysis of the vocal folds. Nutritional drugs such as vitamin B1 and methylcobalamin can be taken to promote the recovery of the damaged nerves, thus restoring the paralyzed vocal folds, which is temporary in some cases. 3. Tumor in the pharynx may compress the recurrent laryngeal nerve and cause paralysis of the vocal folds. Surgery can be performed to remove the tumor and relieve the compression, and the paralyzed vocal folds can be restored, but the symptoms of some patients cannot be restored. Due to the diversity of causes and individual differences, there is no absolute safety and effectiveness of drugs, you need to choose the most suitable drugs for yourself under the guidance of your doctor, and it is recommended that you seek medical treatment for any adverse reactions. It is recommended that patients with symptoms go to the hospital in time to identify the cause of the disease and active treatment.