Pharyngitis refers to the acute and chronic inflammation of the pharyngeal mucosa, submucosal tissue, and local lymphatic tissue. Clinically, it mainly presents as a sore throat or a foreign body sensation in the throat, among other discomforts. Acute pharyngitis should be noted for its certain contagiousness, primarily due to viral infections, bacterial infections, or a combination of both, thus it is contagious. Appropriate precautions such as isolation measures, like wearing masks, should be considered. As for chronic pharyngitis, it is not contagious, so special isolation measures are not necessary. Regarding pharyngitis accompanying other diseases, such as reflux pharyngitis which may also involve Helicobacter pylori infection of the stomach, some literature reports suggest that Helicobacter pylori can be contagious during chronic pharyngitis, but this has not been fully confirmed and is only based on some reports. In summary, acute pharyngitis is confirmed to be contagious, while chronic pharyngitis is currently not contagious.