Throat feeling blocked when lying down is commonly caused by inflammatory secretions exuding from the throat, which are relatively abundant and tend to block the airway. More common is acute pharyngitis, acute attack of chronic pharyngitis, and the presence of rhinitis resulting in postnasal drip syndrome. Due to cold, rain, staying up late, alcoholism, fatigue and other triggering factors that make immunity low, causing viruses, bacteria or mycoplasma, chlamydia invasion to the respiratory tract, so that the mucous membrane of the airway is damaged, the above-mentioned inflammatory reaction, a large number of inflammatory secretions exuded to block the airway. Moreover, when lying down, the secretion of airway partially refluxes to the throat, increasing the edema state of the throat and blocking the throat even more, so the symptom that the throat feels blocked when lying down appears.