When 7-year-old Tengteng came to the clinic, he had been coughing intermittently for nearly three months. He occasionally coughed during the day, but at night his cough became worse, and sometimes he would wake up from sleep. I have been to several hospitals, and have been treated for “upper sensation”, “pharyngitis”, “bronchitis”, “pneumonia”, and “pertussis”. He has also been treated for whooping cough, taking penicillin, cephalosporin, azithromycin and cough medicine, and even injecting cephalosporin and azithromycin, and even using prescriptions, but his cough has not improved at all. It is true that we see a lot of young patients like Tengteng in our clinic. What is wrong with Tengteng? After learning more about Tengteng’s eczema since he was an infant, he also has a runny nose and sneezes occasionally when the weather is cold, and his father is a patient with “allergic rhinitis”. Based on these characteristics, we gave Teng Teng oral anti-allergy medication and budesonide nebulizer inhalation treatment, and the cough symptoms disappeared quickly. In fact, Tengteng was suffering from “cough variant asthma”. So what kind of disease is cough variant asthma? Cough variant asthma is a persistent inflammatory response to antigenic or non-antigenic stimuli and is a common cause of chronic coughing in children. It is often associated with the child’s allergies and can be triggered by viral or bacterial infections, but many pediatricians are unaware of it and the misdiagnosis rate is as high as 95%. Parents often take their children to multiple clinics or hospitals, and many children are treated for respiratory infections such as “upper respiratory tract infection”, “bronchitis” and “pneumonia”. Many children are treated as respiratory infections such as “upper respiratory tract infection”, “bronchitis” and “pneumonia”, and a large number of antibiotics and cough suppressants are used, resulting in ineffective or little results. Cough variant asthma can occur in children of any age, with recurrent or persistent coughing attacks for more than a month, with spring and autumn/winter being the most frequent seasons. Most children have an irritating cough with sputum; it is poorly treated with antimicrobials and effective with hormones or anti-allergic drugs. There are often patients with bronchial asthma, or allergic rhinitis, or drug allergies, or skin urticaria in the family, and the child himself has a personal history of allergies: e.g., eczema in infancy, or allergic rhinitis. If the child has a prolonged cough, if the symptoms are not relieved by antibiotics and cough medicines, and if other organic diseases such as “bronchitis”, “pneumonia” or “bronchial foreign body” are excluded Your child may have an allergic cough if he or she feels weak and sickly, has frequent “colds” (which are not colds), and coughs for a long time each time; he or she likes to rub his or her eyes, nose, and scalp, sweats a lot, and sleeps restlessly, curled up, at the head of the bed for a while and then at the end. They have a history of eczema or skin rashes during infancy; they are prone to sneeze or runny nose when they encounter cold air, cleaning at home or smell irritating odors, and cough easily after drinking cold drinks; they are allergic to certain drugs or foods. These are the physical characteristics that make you susceptible to allergic cough. Diagnostic criteria for cough-variant asthma 1. persistent cough > 1 month, often at night and/or early in the morning, aggravated by exercise, cold air or smell of a specific odor, low sputum, no clinical signs of infection, or ineffective after longer antibiotic treatment; 2. diagnostic treatment with bronchodilators can relieve coughing episodes (basic diagnostic condition); 3. personal or family history of allergy, family history of asthma, the A positive allergen (allergen) test can be used as an auxiliary diagnosis; 4. Exclusion of other causes of chronic cough. How to treat and prevent cough variant asthma? Treatment is based on the principles of removing the cause, controlling attacks and preventing recurrences. The cause of cough variant asthma is complex and influenced by both genetic and environmental factors. Avoid contact with allergens and remove various triggers such as cold, flu, pollen, dust mites, smoke, paint, cold drinks and sudden climatic changes. Drugs are basically the same as those for bronchial asthma, with anti-allergy and anti-inflammatory as the mainstay. Anti-allergic selection of loratadine, ketotifol, etc.; bronchodilators are mainly β-agonists, oral and nebulized inhalation, currently there are albuterol tablets, meprobamate tablets, help preparation tablets, asthma leucovorin aerosol and its nebulized solution, boriconazole solution, etc.; glucocorticosteroids are promethazine aerosol and its nebulized solution, co-corticosterone aerosol, etc.; also can apply aminophylline, cisplatin, etc.; for serious condition, clear For those who have serious conditions and clear allergens, specific desensitization treatment can also be carried out, but it must be carried out in qualified units with conditions. In addition, daily life should pay attention to avoid factors that trigger allergies: 1. When the outdoor ambient temperature drops to 25 to 26 ℃, there will be more dust mites, mold and other allergens, so attention should be paid to avoiding allergens; 2. When the seasons change and the temperature changes suddenly, parents should try to prepare their children for cold and warmth to avoid getting cold; 3. Avoid eating foods that cause allergies, such as seafood; 4. Avoid three cold: cold drinks, cold wind, too cold air conditioning; 5. Air conditioning is too cold; 5, avoid the four major: laughing, shouting, crying and fussing; 6, appropriate exercise, children should avoid strenuous exercise in the dry and cold environment. Such as the prohibition of continuous strenuous exercise on snow and ice. While the environment is warm, high humidity or intermittent exercise should be encouraged. When doing exercise, the principle of not feeling tightness in the chest, shortness of breath, physical discomfort, should stop exercise and strengthen rest when there are symptoms. Try to do the above, of course, if under complete control of medication, the child can still live, exercise, play and study like a normal child.