The main symptom of eosinophilic bronchitis is chronic irritating cough, and some patients will be more sensitive to cold air dust. 1. Chronic irritating cough: the main symptom is irritating cough. Generally dry cough, occasionally there will be some mucus sputum, can be in the daytime cough, can be in the night cough, usually the duration of time is not the same, there is no other obvious symptoms. 2. Allergy to cold air as well as dust: some patients are allergic to dust, fumes, odors and cold air, and the patients usually do not have symptoms such as dyspnea or shortness of breath. Eosinophilic bronchitis mainly has some of the above symptoms, generally the lung ventilation function will be in a normal state, but after diagnosis, it is recommended that timely treatment under the guidance of a doctor!