There are two types of vocal fold congestion: 1. Bright red congestion, which are acute laryngitis. Clinically, it mainly occurs when the patient has an acute upper respiratory tract or acute lower respiratory tract infection induced. Most patients will have obvious hoarseness and even loss of voice. Patients can have a painful sensation in the pharynx, a very pronounced cough, coughing sputum, coughing yellow sputum and other clinical manifestations. If individual patients have diffuse edema of the vocal cords, they may experience breathing discomfort and dyspnea.2. Dark red congestion of the vocal cords is mainly seen in chronic laryngitis, where patients are usually more talkative and usually use their voice very much, common occupations are teachers, singers, orators, etc. The patient’s voice is hoarse, with a long medical history, and the voice is sometimes light and heavy, sometimes good and sometimes bad, the patient may have a dry throat, foreign body sensation in the pharynx, burning sensation in the pharynx and other manifestations of pharyngitis, the patient may have the characteristics of speaking effort. For such patients, it is generally recommended to do nebulization therapy.