There are many reasons why your throat gets itchy at night, the common ones are reflux pharyngitis, allergic pharyngitis, upper airway cough syndrome and so on. 1. Reflux laryngitis: stomach contents reflux to the throat above the upper esophageal sphincter, reflux stimulates the mucous membrane of the throat triggered by a number of inflammatory manifestations. Sleeping at night due to changes in body position is more likely to stomach acid stimulation, resulting in itchy throat. 2. Allergic pharyngolaryngitis: chronic inflammation of the pharyngeal mucosa, submucosa and its lymphatic tissues, caused by a variety of reasons, especially during the autumn and winter seasons by the impact of the climate often aggravate the symptoms. Often manifested as pharyngeal itching, with the progress of the disease can appear sore throat, cough and other symptoms. 3. Upper airway cough syndrome: also known as postnasal drip syndrome, due to nasal diseases caused by secretions flowing back into the postnasal and pharyngeal areas, and even backflow into the voice box or trachea, resulting in a cough as the main manifestation of the syndrome, sleep at night due to secretion stimulation of the pharyngeal mucosa can be accompanied by pharyngeal itchy symptoms. Throat itchy at night there may be other reasons, if the symptoms are obvious, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor active treatment.