Vocal cord paralysis mainly depends on what causes it. Many of them are caused by tumors of the thyroid, lung, bronchus, esophagus, stomach and skull, resulting in paralysis of the laryngeal return and superior laryngeal nerve. At this time, medication does not work, only surgery can be considered. If metastasis has occurred, radiotherapy treatment should be considered. If it is caused by upper respiratory tract infection, it is mostly caused by viral bacteria that cause nerve palsy, and the attack is mostly on the laryngeal return and supraglottic nerve. At this time, the treatment is mostly antiviral, mainly ganciclovir and acyclovir, together with nerve-nourishing drug therapy, such as methylcobalamin tablets, ginkgo biloba.