Coughing for a long time will not become asthma, cough belongs to the clinical symptoms, is caused by diseases, such as the common cold, pneumonia, bronchodilatation, bronchial asthma, and bronchopneumonia, etc. can produce coughing symptoms, while asthma belongs to the clinical disease, is a chronic inflammatory disease of the airways, the clinical symptoms of the main recurring chest tightness, wheezing or coughing. Asthma is triggered by exposure to allergic substances or respiratory infections, and is not necessarily related to coughing. Coughing can cause a sore throat or bronchial spasm, which can lead to chest tightness, but a prolonged cough does not become asthma. Therefore, it is important to look for the cause of a prolonged cough, such as blood analysis, chest X-ray, lung function and other relevant tests to identify the cause.