Most of the causes of itchy throat are chronic pharyngitis, which is a common disease in otolaryngology. Its symptoms include foreign body sensation in the throat, hoarseness or itchy throat, and easy retching in the morning. Some patients have itchy throat caused by chronic pharyngitis, and some patients have gastroesophageal reflux, which can cause reflux pharyngitis, including itchy throat, foreign body sensation in throat, excessive phlegm, and easy to clear throat. Another kind of people may have nasopharyngitis or rhinitis, sinusitis, nasal polyps and so on. The secretion caused by these conditions flows back, forming a drip behind the nose, and there is also the possibility of itchy throat. There are also hypertensive patients who take antihypertensive drugs orally, and some antihypertensive drugs are prone to side effects such as itchy throat and dry cough.