I often hear parents say that their children have a chronic cough or cough for more than 10 days after catching a cold, but the cough is not reduced, but has a tendency to worsen, and it is heavy at night, coughing continuously for several times in the middle of the night and coughing loudly. It affects the whole family’s sleep at night. Water is also hung, medicine is also eaten, but it is not good. He also rubs his nose and eyes a lot. It is likely that this is a common cough caused by allergies – cough variant asthma. Cough variant asthma has been recognized and is on the rise. It can develop at any age during the pediatric period, but is more common in young children and preschoolers (3-7 years old). It is characterized by recurrent or persistent cough for more than 1 month, mostly nocturnal and morning episodes, aggravated by exercise or crying, seasonally unlimited, accompanied by chest tightness. Two-thirds of the children have a history of allergy, some of them have a history of family allergy, positive allergen test, elevated IgG, increased airway resistance by pulmonary function measurement, and no significant abnormalities on chest X-ray. General antibiotics and cough suppressants are not effective, and treatment with wheezing drugs (bronchodilators) can stop the cough. The pathogenesis of this disease is the same as that of asthma, and its pathophysiological changes are all characterized by chronic airway inflammation and air hyperresponsiveness, which is now considered to be bronchial asthma with cough as the main symptom (cough variant asthma). As it manifests as recurrent respiratory infections, it causes great pain to children and parents. Western asthma medications can stop coughing but cannot solve recurrence, and corticosteroid use has certain side effects. Cough variant asthma should belong to the category of “cough” in Chinese medicine, and the causes are external evil and internal injury. Internal injuries are seen in the wood-fire type of gold. The author intends to summarize my clinical treatment experience as follows. 1. Lung heat evidence: Most of them are recurrent irritating coughs, a few are chronic dry coughs with little sputum that cannot be easily coughing out, or coughing during exercise. The tongue is red and the coating is thin and greasy. There may be pharyngeal itching and choking cough with thin yellow moss and floating pulse; or there may be thirst and sore throat, dry throat, red tongue and pulse number. Treatment: Clearing heat and purging the lung to stop cough. Commonly used drugs: Almond, Chuanbei mother, orange peel, XuanShen, Scutellaria baicalensis, Scapularia scabra, DaiClamShan, rhizome, stiletto. Add mulberry leaf, peppermint, cicada, and anterior hu for wind-heat. For dry heat, add Radix et Rhizoma Ginseng, Radix Paeoniae Alba, Roasted Loquat Leaf. 2.Cold lung disease: chronic cough, or with a small amount of foamy sputum. Inhalation of cold air causes coughing, frequent sneezing, stuffy nose and runny nose with sticky texture. Pale tongue with white fur. Treatment: Warming the lung to stop cough. Su Chen Jiu Bao Tang with addition and subtraction: Ephedra, Almond, Su Zi, Chuan Pu, Chen Pi, Fucus, Cang Er Zi, Mulberry Pi. The wind-cold in the surface plus Jin Bo Cao, Fang Feng, Qian Hu, and Di Shen Zi; lung cold is very fine spice, dry ginger. 3. Liver fire offends the lungs: coughing with rebellious Qi, continuous sound, or even coughing leading to pain in the chest. Coughing easily when inhaling irritating odors. The face is red and the throat is dry, the tongue is thinly coated with yellow and less fluid, and the pulse is stringy. Treatment: To clear the lung and remove fire, use diarrhea and white clam powder. Commonly used drugs: Danpi, almond, mulberry peel, Dai Clam San, rhizome, ground bones, hook vine, baicalin, orange red. The heat hurts yin, plus maitake, sage. 4. Lung Qi deficiency: Frequent colds, coughing for a long time, weakness and lack of energy. Pale tongue, thin coating, thin pulse with little force. Treatment: Tonifying the lung and consolidating the surface. Selected drugs: Astragalus, Atractylodes, Fructus, Cinnamomum, Paeonia lactiflorum, Cordyceps, Schisandra, Ganoderma, Salvia, Rhizoma, Ginseng, Ginger and Jujube. Or use Yu Ping Feng San and Gui Zhi plus Huang Qi Tang. After the disease is stabilized, use pills to regulate the lung and spleen and consolidate the therapeutic effect.