Eosinophilic cough is mainly common in eosinophilic pneumonia or bronchitis. It is mainly due to various causes such as exposure to allergens (e.g. pollen, fumes, mites), worm (e.g. roundworm) infections, fungal or parasitic infections, and vasculitis, resulting in elevated eosinophils in the body, which causes lung exudation, pneumonia or airway narrowing due to contraction and spasm of bronchial smooth muscle, coughing, shortness of breath, or even a persistent state of asthma leading to dyspnea, causing hypoxemia and even hypercapnia causing respiratory failure. At present, the main treatment is based on glucocorticoids, supplemented by other anti-allergic drugs.