Allergic pharyngitis, reflux pharyngitis, acute pharyngitis, etc. are common clinical causes of itchy dry throat cough. 1. Allergic pharyngitis: Some people may be allergic to pollen, dust mites, animal dander and other allergens. Once exposed to these allergic substances will cause the body to produce an allergic reaction, the respiratory tract is in a state of high reaction, can appear itchy throat, dry cough and other symptoms. 2. Reflux pharyngitis: Impairment of anti-reflux structure and function, increased secretion of gastric acid, and reduced resistance of esophageal and pharyngeal mucosa can lead to the onset of reflux pharyngitis. The reflux of gastric acid into the throat will cause irritation to the local mucosa, and may also cause itchy dry cough in the throat. 3. Acute pharyngitis: when the respiratory tract of chlamydia, mycoplasma, legionella and other pathogenic microbial infections, will induce the body to produce an immune response to the respiratory mucosal irritation, itchy throat, dry cough and other symptoms. There may be other causes of itchy throat and dry cough. It is recommended to go to the respiratory department or ear, nose and throat department of the hospital after the onset of the disease, and cooperate with the doctor to improve the blood routine, CT, allergens and other related tests, in order to clarify the cause of the disease.