The difference between asthma and allergic cough mainly lies in the symptoms, signs, auxiliary examination and treatment. 1. Symptoms: Asthma is characterized by chest tightness, shortness of breath and dyspnea. Allergic cough is mainly characterized by irritating dry cough without obvious symptoms such as wheezing and chest tightness. 2. Physical signs: asthma attack can be detected in both lungs widespread rales, allergic cough without rales. 3. Auxiliary examination: lung function test in acute asthma attack is manifested as obstructive ventilatory dysfunction, bronchial provocation test and bronchodilator test are positive. Allergic cough is negative. 4. Treatment: Asthma is mostly treated with glucocorticoids with bronchodilators such as budesonide formoterol. Allergic cough can be relieved with antihistamines such as cetirizine or glucocorticoids such as budesonide powder inhaler. If the patient has symptoms, it is necessary to consult a doctor in time to clarify the diagnosis and standardize the treatment, so as not to delay the disease.