Variant asthma is known as cough variant asthma, cough variant asthma belongs to a special type of bronchial asthma, the main difference is: bronchial asthma is usually accompanied by obvious wheezing, coughing and coughing up sputum, while cough variant asthma is usually characterized by a severe dry cough as the main symptom. The causes of asthma are complex and are related to genetic and environmental factors. Bronchial asthma is usually accompanied by significant coughing, coughing up phlegm, and wheezing, and flares up seasonally. Severe attacks may be accompanied by dyspnea and hypoxemia. Aura symptoms such as runny nose and sneezing may precede an attack. However, cough variant asthma is usually characterized by a severe dry cough with no sputum or just a small amount of sputum. The attacks are usually worse in the second half of the night and in the morning and can be aggravated by exercise. Bronchial asthma and cough variant asthma, in the treatment is the same, once diagnosed, you need to see a doctor as soon as possible, improve the examination, under the guidance of the doctor’s scientific use of drugs.