The severity of eosinophilic bronchitis, also known as eosinophilic bronchitis, is closely related to the clinical manifestations of the patient, as well as the degree of eosinophil elevation suggested by blood tests. In eosinophilic bronchitis, the main clinical manifestations of the patient are dry cough, low sputum, chest tightness, shortness of breath, mostly accompanied by allergic rhinitis and allergic urticaria. The blood routine suggests a significant increase in eosinophils, especially the percentage of eosinophils in induced sputum cells is significantly higher. The treatment of eosinophilic bronchitis is mainly based on hormonal anti-inflammatory and anti-allergic treatment, and antibiotics are not easily chosen. Eosinophilic bronchitis belongs to the category of atypical asthma, which can easily develop into typical bronchial asthma after repeated attacks if not treated in a timely manner. It needs to be detected early, given early and aggressive anti-inflammatory treatment, and detached from allergens to avoid repeated attacks that worsen the condition and lead to typical asthma and severe asthma.