The epiglottis is located behind the root of the tongue and is blade-shaped, consisting of cartilage covered with mucous membrane. It has the function of preventing food from entering the larynx and trachea. The epiglottis cartilage is usually blade-shaped, slightly curled, wide at the top and narrow at the bottom, the epiglottis cartilage is covered with mucous membrane to form the epiglottis, which is located in the upper part of the larynx. The epiglottis can be divided into the lingual and laryngeal surfaces, and the lingual surface is lax and prone to swelling when infected. The epiglottis is the living valve of the laryngeal opening. During swallowing, the larynx lifts up and moves forward with the pharynx, and the epiglottis covers the laryngeal inlet, preventing food from entering the laryngeal cavity. When speaking or breathing, the epiglottis moves upward, opening the laryngeal cavity. Discomfort in the epiglottis may lead to epiglottis cyst, epiglottitis, epiglottis cancer and other diseases, resulting in pain, swelling, dyspnea, dysphagia and other symptoms, patients with discomfort need to go to the hospital in time to get a clear diagnosis and treatment, and avoid self-medication.