A cough does not become asthma. There is a relationship between asthma and cough, but they are two different things. Coughing is a common defensive reflex and action, and normal people also experience coughing symptoms. The coughing action occurs when the cough receptors located in the respiratory tract are stimulated with a certain intensity and is a neurological reflex process. Many diseases can cause coughing, such as common respiratory tract infections, respiratory tumors, and foreign bodies in the airways. Asthma is a chronic inflammatory disease of the airways, a chronic non-specific inflammatory condition in which there is airway hyperresponsiveness. In acute attacks, coughing can occur in addition to symptoms such as chest tightness, wheezing and dyspnea. Therefore cough is a symptom and a neurological reflex, asthma is a clinical disease, the symptoms are only reactions to the disease and do not become disease, it is an encompassing and encompassing relationship, not a progressive evolutionary process.