Eosinophilic bronchitis, medically known as eosinophilic bronchitis, is a non-asthmatic bronchial inflammation mainly characterized by eosinophilic infiltration of the airways. The main symptom is chronic irritating cough, part of the patient is sensitive to the odor of fumes. 1. Chronic irritating cough: the main clinical symptom of eosinophilic bronchitis is chronic hacking cough (more than 8 weeks), usually dry cough, occasionally there may be a little sputum, day and night may cough. 2. Sensitive to fumes and odors: eosinophilic bronchitis patients, some of whom will be more sensitive to dust, odors, fumes and cold air, generally no dyspnea, no asthma symptoms, normal lung ventilation, no airway hyperreactivity. The symptoms of eosinophilic bronchitis vary from person to person, and usually require active treatment in the hospital after diagnosis.