Cough without sputum may be seen due to various reasons such as reflux esophagitis, pneumonia, lung cancer, allergies, etc. In case of reflux esophagitis, symptoms such as dry cough, acid reflux, retrosternal pain, etc., usually without coughing up sputum, can be treated with acid-suppressing drugs such as cimetidine tablets and omeprazole capsules. Pneumonia may have dry cough in the early stage, with the progress of the disease, cough, sputum, fever and other symptoms, which is related to the degree of infection, and it is recommended to use anti-infective drugs to treat the cause. Lung cancer is characterized by dry cough in the early stage, which gradually worsens, and symptoms such as hemoptysis, emaciation and dysphagia gradually appear. Allergy can also lead to cough without sputum, such as pollen allergy, air pollution leading to allergy, and so on. Cough without sputum may also be caused by other reasons. When there is unexplained cough, it is recommended to consult a doctor as soon as possible to find out the cause of the disease and treat it actively.