Patients may suffer from cold, respiratory bacterial or viral infections, excessive vocal speech, or even shouting, which may cause acute and chronic congestion and swelling of the mucous membrane of the larynx and vocal cords, resulting in poor closure of the vocal cords and significant hoarseness when speaking. The symptoms of hoarseness when speaking are obvious. In addition, some patients may have a certain degree of pain, dryness, burning, and foreign body sensation in the larynx, and some patients may have various benign and malignant neoplastic diseases in the larynx, including small nodular polyps, papillomas, hemangiomas, and even cancerous lesions in the larynx, which require further electronic laryngoscopy for differential diagnosis.