It is common to see children with a cough that is recurrent or persistent, or paroxysmal. Parents may find that their child has a few unexplained coughs as soon as they wake up in the morning; the application of antibiotics or anti-cough medications or herbal treatments is ineffective or ineffective. Many are diagnosed as bronchitis? Maybe it is wrong. Long-term coughing needs to be alerted to cough variant asthma. Cough variant asthma is a special type of asthma – asthma without wheezing – in which chronic cough is the main or only clinical manifestation. It occurs mostly at night or in the early morning, often with an irritating cough, and is easily misdiagnosed as bronchitis. Characteristics of cough variant asthma in children 1. Most of them have a clearer family history of allergy or a history of allergic diseases in other parts of the body, such as allergic rhinitis and eczema; allergen tests can be positive; 2. Clinical manifestations are mainly long-term persistent dry cough, often induced after exercise, inhalation of cold air or upper respiratory tract infection, intensifying at night or in the early morning, without croup on physical examination; attacks are mostly seasonal, with Most episodes are seasonal, with spring and autumn being the most common; 3. General cough and phlegm medication and antibiotic therapy are ineffective, while antihistamines, β2-agonists, theophyllines or adrenocorticosteroids can relieve the symptoms; 4. Chest X-ray is normal; 5. Most pulmonary function tests are normal; 6. Bronchial excitation test is positive, and when a positive reaction occurs, an irritating cough similar to that of the onset can occur, suggesting the presence of airway hyperresponsiveness. Once cough variant asthma is diagnosed, it should be treated early, with the aim of relieving symptoms, reducing airway inflammation and, more importantly, preventing the development of typical asthma. 1. low to medium doses of inhaled glucocorticoids (ICS) plus short-acting β2-agonists as needed; 2. leukotriene receptor antagonists (montelukast sodium) have both strong anti-inflammatory activity and certain bronchodilatory effects, and are easy to use and have a high safety profile.