Variable asthma, known as cough variant asthma, is a disease that, if left untreated, can progress to classic asthma in some patients, with the possibility of complications such as infections, bronchiectasis, and chronic obstructive pulmonary disease (COPD). Cough variant asthma is a special type of asthma with chronic cough as the only or main symptom, not accompanied by obvious symptoms such as wheezing and shortness of breath. In most patients, cough symptoms can be controlled with medication, but discontinuation of medication may cause a relapse, and the disease generally requires long-term treatment. If cough variant asthma is not treated in a timely and standardized manner, some patients will gradually develop into typical asthma, which can be complicated by pneumothorax, mediastinal emphysema, and pulmonary atelectasis during severe attacks; long-term recurrent episodes or infections can lead to chronic complications, such as chronic obstructive pulmonary disease (COPD), bronchodilatation, interstitial pneumonitis, and pulmonogenic heart disease. If you are diagnosed with cough variant asthma, or if you have long-term cough symptoms that do not resolve, you should consult a doctor for standardized treatment to avoid delaying your condition.