The old phlegm blockage in the throat is mostly seen in chronic simple pharyngitis, reflux pharyngitis and chronic rhinitis. 1. Chronic simple pharyngitis: it is a chronic inflammation of the mucous membrane of the pharynx, which may be caused by environmental factors, occupational factors, bacteria and other stimuli, and often causes a foreign body sensation and burning sensation in the throat, and sometimes there is an increase in the amount of secretion and a feeling of phlegm. 2. Reflux pharyngitis: due to gastric acid reflux on the throat caused by irritation, causing local edema, increased secretion, can be due to excessive secretion of gastric acid, lower esophageal sphincter dysfunction and gastric dynamics and other causes of disease. 3. Chronic rhinitis: chronic rhinitis often leads to an increase in nasal secretions, and most of them are viscous secretions, too much secretion backflow into the throat, you will feel the throat old phlegm blocked panic. Throat old phlegm blocked panic, there may be other diseases, if the symptoms continue to be unrelieved, the need for timely medical attention, identify the causes of targeted treatment.