I’ve been coughing for more than 20 days, I’ve taken medicine to clear heat and fire, antibacterial and anti-inflammatory drugs, including chest x-rays, but I’m not getting better, and I haven’t found the real cause. …… Experts remind that allergic pharyngitis, which is prevalent in spring, is also one of the causes of prolonged coughing, so don’t think that allergies are only related to the skin and nose. If you cough a lot but have no other respiratory infection symptoms, you should consider whether you have allergic pharyngitis. It is common to think of the nose or skin as being prone to allergies, but the throat can also become inflamed due to allergies, and it is very easy to misdiagnose this condition. As with allergic diseases such as allergic rhinitis and asthma, contact with allergens is the main cause of this disease. In addition, repeated infections of the respiratory tract and decreased resistance due to being too busy and tired may also irritate the mucous membrane of the throat, triggering sore throat, dry cough and itchy throat. It is often found that many patients have been ill for more than two weeks or even more than a month when they visit the ENT department. This is often because many people mistakenly believe that they have a lung infection, but when they go to the hospital for a chest X-ray, no lung problem is found, so they leave it alone. In fact, it is not difficult to distinguish allergic pharyngitis from other respiratory diseases, as long as you look carefully to see if there are other symptoms of respiratory infection other than easy coughing. Generally speaking, allergic pharyngitis is often just a “cough” that is aggravated by odor or coughing at night, accompanied by an itchy throat, no phlegm or only a small amount of white phlegm, while diseases such as colds, rhinitis or bronchitis are accompanied by fever, coughing, runny nose, local discomfort and even headache. Therefore, allergic people, especially those with a history of allergic rhinitis, asthma, allergic purpura, urticaria and other allergic diseases, such as “dry cough” symptoms, it is best to rule out the possibility of allergic pharyngitis. Of course, this is not to say that adults with no previous history of allergies do not need to care about it, because as people get older, some may also change their constitution, and as a result, “they are now allergic even if they were not allergic before”. Although allergic pharyngitis may sound troublesome and easy to misdiagnose, the treatment of this disease is not complicated. Patients can reduce their symptoms until they disappear by taking anti-allergy and airway spasm relief medications. The most important thing is to do preventive work on a daily basis, such as avoiding contact with allergens, wearing a mask when going out, and exercising moderately to improve the body’s immunity, all of which can make the throat less susceptible to allergies.