Patient: Description of the condition (onset time, main symptoms, hospital visited, etc.): I am 33 years old, smoked for 10 years, have a chronic cough for years, and recently, since I speak loudly, my throat is uncomfortable, and my chest is uncomfortable, I want to cough Chest X-ray orthopantomography: the results are not abnormal What is the disease and how to cure it. Jiang Yan, Department of Respiratory Oncology, Xiamen Second Hospital: Chronic cough has many causes, the common ones are: chronic bronchitis, mostly caused by smoking. 1. allergic cough: such as recent colds, keeping pets such as cats and dogs, home renovation house paint, food allergies, 2. cough variant asthma: there are obvious triggers, cold air, some have a family history of asthma, etc. 3, reflux esophagitis: acid reflux, belching, determination of esophageal pH acid 4, nose causes: sinusitis, nasal septum deviation 5, cardiogenic: heart causes increased intravascular pressure 6, taking hypertensive drugs, etc., can do chest X-ray, pulmonary function tests, allergen testing, immunoglobulin IgE, esophageal pH measurement, nasal endoscopy and other tests, and even cardiac color ultrasound. To determine what the cause is, in order to prescribe the right medicine. But first of all, you have to quit smoking. The incidence of lung cancer is many times higher in smokers than in non-smokers, and the earlier you smoke (the younger you are), the more you smoke, and the longer it lasts, the greater the risk.