Asthma is a very common clinical disease, mainly refers to wheezing bronchitis more than three times in a year, and it continues to attack every year, and it is often difficult to cure in treatment and has a high mortality rate. Generally, bronchial asthma starts in childhood, and asthma in adults develops after children are not cured. The first two are common in children. Asthma cough often has its own characteristics, and high airway sensitivity is a very important feature of asthma, such as coughing after being cold, such as cold wind, eating cold drinks or strenuous exercise, or coughing in the middle of the night, all of which are caused by high airway These conditions are caused by high sensitivity of the airways. 2. Whether the child has any allergic manifestations: for example, whether the child has had eczema, allergic rhinitis, allergic conjunctivitis, etc., and whether the parents have a history of allergic rhinitis, cough, or asthma; if they have, the child’s likelihood of getting asthma increases significantly. 3, there are repeated wheezing situation, generally more than 2 times is a repeated, more than 3 times wheezing infection is relatively small, no fever caused by wheezing, to consider asthma. 4.When children have an asthma attack, croup and prolonged expiratory phase can be heard on the lungs; 5.The symptoms can be relieved by anti-asthma treatment or remitted by themselves; 6.If children do not have typical symptoms, pulmonary function tests are needed to clarify whether children have asthma. Of course, the diagnosis of asthma needs to be made under the guidance of a specialist, and one should not make a blind conclusion at home, and long-term, continuous, standardized and individualized treatment is needed after the diagnosis.