Laryngoscopy is needed in cases of suspected laryngeal card, long-term recurrent chronic pharyngitis, vocal cord polyps or tumors, reflux laryngitis, etc., as follows: 1, suspected laryngeal card: such as a fish spike card, and the naked eye can not see the case, you need to do electronic laryngoscopy to see whether there is, if there is, can be removed under the laryngoscope, otherwise it is easy to delay the disease. 2, long-term recurrent chronic pharyngitis: it is also clinically recommended to do electronic laryngoscopy, some patients have taken a lot of drugs for laryngitis for a long time, but always bad, it is recommended to do electronic laryngoscopy to clarify the condition. 3, vocal cord polyps or tumors: if you suspect that the larynx has something long, such as suspected vocal cord polyps, vocal cord nodules or malignant tumors, such as laryngeal cancer, hypopharyngeal cancer, etc., it is clinically necessary to do laryngoscopy to determine 4. Reflux laryngitis: Some patients have long-term throat discomfort, such as itchy throat, recurrent burping, acid reflux and so on, which is clinically suspected to be reflux laryngitis, also need to do electronic laryngoscopy. Other conditions, such as routine need for electronic laryngoscopy before thyroid surgery to determine vocal cord movement.