There are many diseases that cause laryngeal nerve paralysis: 1. Central laryngeal paralysis caused by lesions in the cerebral cortex of the laryngeal motor center. Because the laryngeal motor center of each side of the cerebral cortex has a nerve bundle with both sides of the nucleus accumbens, that is, each side of the larynx receives impulses from both sides of the cortex, so the central laryngeal paralysis is rare. The common causes are cerebral hemorrhage, cerebral thrombosis, brain tumor, brain abscess, traumatic brain injury, cerebrospinal cavernous disease, medullary tumor, spinal cord tuberculosis, etc. 2, peripheral The laryngeal paralysis caused by the vagus nerve leaving the brainstem to the site before the division of the recurrent laryngeal nerve and the lesion of the recurrent laryngeal nerve, according to the nature of the cause: (1) trauma: skull base fracture, lateral skull base surgery, neck trauma and surgery, thyroid surgery, thoracic mediastinal surgery, anterior cervical spine surgery, etc. injury to the vagus nerve or the recurrent laryngeal nerve can cause laryngeal paralysis. (2) Tumors and other occupying lesions: tumors of the pontocerebellar angle compressing the vagus nerve, nasopharyngeal carcinoma invading the skull base or compressing the vagus nerve at the jugular foramen can cause laryngeal paralysis; metastatic tumors of the neck, thyroid tumors, Hodgkin’s disease, carotid aneurysms, etc. can compress the vagus nerve and cause laryngeal paralysis; aortic aneurysms, mediastinal tumors, lung cancer, tuberculosis, esophageal cancer, pericarditis, esophageal achalasia, etc. can compress the thoracic segment and cause laryngeal paralysis. The laryngeal paralysis may occur due to compression of the laryngeal nerve. (3) Inflammation: Infectious diseases such as influenza, laryngeal diphtheria, lead and other chemical poisoning, acute rheumatism, measles, syphilis, etc. can cause laryngeal paralysis due to perineuritis of the laryngeal nerve.