Chronic cough (unexplained cough for more than 8 weeks), but the diagnosis of the cause of chronic cough can sometimes be a very long and complicated process. You need to have enough patience on your own. Based on the history you have provided so far, I think you first need to rule out cough variant asthma or allergic cough as a type of disease. This disease is characterized by a long-term recurrent cough, sensitivity to unpleasant odors such as oil smoke and cigarette smoke, or difficulty in recovering from a cold or flu. Anti-infective and anti-inflammatory treatment is not effective. Chest radiographs usually do not reveal any major problems and are at most a manifestation of bronchitis. Some patients have allergic constitution. Suggestions: 1, first to the hospital to perform pulmonary function, allergen testing and other tests. 2, if the above tests are normal before proceeding to the next procedure.