Symptoms of laryngeal edema mainly include dyspnea, hoarseness and bruising of lips and mouth. 1. Difficulty in breathing: laryngeal edema is caused by edema of the mucous membrane of the pharynx and infiltration of tissue fluid. As the laryngeal cavity is relatively narrow, which is the entrance to the respiratory tract, laryngeal edema will lead to narrowing of the pharynx, causing breathing difficulties. 2. Hoarseness: The vocal cords are in the pharynx, which is an important vocal organ of the human body. Laryngeal edema caused by infiltration of tissue fluid in the throat, such as in the vocal folds, will compress the vocal cords, causing hoarseness. 3. Lip and mouth bruising: the pharynx is the entrance to the human respiratory tract, laryngeal edema leads to narrowing of the pharynx, the lack of oxygen into the human body, resulting in hypoxia, lip and mouth bruising. The occurrence of laryngeal edema should be timely to the hospital, in the professional doctor to clarify the cause of the disease to take a systematic and standardized treatment, so as not to delay the condition.