Allergic cough, or cough variant asthma, is characterized by paroxysmal dry cough, choking cough, no sputum or a small amount of white mucous sputum, mostly in the early morning, at night or after exercise, with little respiratory distress and wheezing. The disease is recurrent and persistent, and has now become one of the common causes of chronic cough in children. Among the 72 cases, 43 males and 29 females, aged 4-10 years, had recurrent or prolonged coughing episodes of up to 1 year and as short as 2 months at the time of consultation. 52% of the cases had a history of eczema and allergic rhinitis in infancy, and 7 cases had a family history of allergy. The lungs were not abnormal on auscultation in 45 cases, the breath sounds in both lungs were slightly coarse in 21 cases, and irregular dry rales were heard in 6 cases. 43 cases had varying degrees of pharyngeal congestion, 27 cases had enlarged tonsils, 13 cases had hyperplasia of lymphatic follicles in the posterior pharyngeal wall, and most cases had a red tongue with thin or little moss. 39 cases had no significant abnormalities on chest X-ray, and 33 cases showed increased texture in both lungs. The 72 cases were randomly divided into 40 cases in the treatment group and 32 cases in the control group, and the general data of the two groups were comparable. 2. Diagnostic criteria All 72 children met the diagnostic criteria for allergic cough [1]: ① persistent or recurrent cough >1 month, often with episodic cough at night or in the early morning, with little sputum and aggravated by exercise; ② no clinical signs of infection or ineffective with long-term antibiotic treatment; ③ the use of bronchodilators can relieve coughing episodes (basic diagnostic condition); ④ personal history of allergy or family history of allergy, airways are hypo Reactivity and positive allergen test can be used as an auxiliary diagnosis. Exclude those with cough due to respiratory tract infection or some such chronic disease. 3. Treatment 3.1 Treatment group: Guided by the method of nourishing Yin and dispelling wind to promote lung, a self-prepared traditional Chinese medicine formula (composed of Sha Shen, Mai Dong, Wu Mei, Sang Bai Pi, roasted Aster, roasted Winter Flower, Zi Cao, Yu Jin, Cicada, etc.) plus the western drug ketotifen was used as the mainstay. One dose daily, decoction in water, divided into morning and evening. Ketotifen, 1 mg each time, twice a day, divided into morning and evening. 3.2 Control group: treated with ketotifen plus aminophylline. Ketotifen, 1mg per dose, twice daily, divided into morning and evening. Aminophylline, 4mg/kg/time, 2 times daily, divided into morning and evening. 3.3 Treatment course: Both groups took 10 days as a course of treatment, and used for 3 courses. 2 groups were compared after the course of treatment. 4. Efficacy observation 4.1 Efficacy criteria The efficacy criteria for cough were formulated with reference to the Diagnostic Efficacy Criteria for Chinese Medical Evidence promulgated by the State Administration of Traditional Chinese Medicine (ZY/ T 001.4 I 94). Cured: cough symptoms disappeared; Effective: cough symptoms were basically controlled, with occasional light cough in the morning or after activities; Ineffective: cough symptoms did not improve or worsened. 4.2 Treatment results The x2 test was used to compare the efficacy of the 2 groups. There was a significant difference between the treatment group and the control cure rate (x2 was 14. 59 .P< 0.01), indicating that the cure rate of the combined Chinese and Western medicine treatment group was significantly higher than that of the Western medicine control group alone. The total effective rate was compared using the x2 test, and there was no significant difference (x2 was 0. 63 P> 0. 05), indicating that the total efficacy of the combined Chinese and Western medicine treatment group was roughly comparable to that of the Western medicine control group. 5. Discussion Allergic cough, also known as “cough variant asthma”, belongs to the category of “cough” in Chinese medicine. At present, with the influence of environmental pollution and other factors, the number of children with this type of disease is gradually increasing clinically. However, the diagnosis of this disease requires various tests to exclude other causes of cough symptoms, especially those caused by viral infection or mycoplasma infection. The cough is most likely to be triggered by external evil because the child is not yet full of Qi, the skin is tender and the external function is poor. The external evil first offends the lung qi, which loses its propagation and remains untreated for a long time, easily causing heat to burn the fluid and injure the lung yin, depleting the lung qi. Therefore, treatment should be based on nourishing Yin, dispelling wind and promoting lung, and also desensitization. In this formula, Sha Shen, Mai Dong and Wu Mei nourish lung yin and astringent lung qi; roasted Zingiber officinalis and roasted Dong Hua moisten the lung and dissolve phlegm to stop coughing; Sang Bai Pi clears the lung and eliminates phlegm; Cicada Cloth dispels wind; Yu Jin cools blood and activates blood circulation; Zi Cao dispels wind and cools blood to activate blood circulation; Zi Cao and Yu Jin are used in the treatment of this disease, which means that “treating wind first treats blood, and the wind will be extinguished when blood is flowing”. The combination of all the medicines together is effective in nourishing Yin, dispelling wind, promoting lung and relieving cough, and desensitizing with ketotifen. From clinical observations, the combination of Chinese and Western medicine in the treatment of pediatric allergic cough has the advantages of good efficacy and short duration of treatment, and can play a good role in rapidly improving cough symptoms.