The fact that a dry cough becomes a cough with phlegm, that is, becomes a wet cough, does not determine whether it is good, or bad. The severity of the condition is also determined by the cause of the illness and the accompanying symptoms. There are many clinical conditions that can be associated with a dry cough, the most common being allergic coughs, such as cough variant asthma, a specific type of bronchial asthma. If a persistent cough, even accompanied by wheezing and shortness of breath, is easily present, the condition is serious. In addition, for patients who have a dry cough with sputum, it is likely to be accompanied by a bacterial infection and a large amount of pus sputum, when the secretions in the airways increase. If the sputum is too sticky when the water is low, it is also easy to form a large number of large sputum plugs to block the airway and aggravate the cough, and even cause the symptoms of wheezing and shortness of breath to continue to increase.