Bronchial asthma belongs to the Chinese medicine category of croup, and mealybugs can be made into pills and wine to treat croup. Mealybugs, as a kind of Chinese herbal medicine, is salty in taste and flat in nature, with the functions of tonifying the lungs and kidneys, holding the qi to settle the wheezing, and assisting the yang to benefit the essence. It is mainly used for lung and kidney insufficiency, asthma, coughing and hemoptysis, impotence, spermatorrhea, there is no authoritative information on the adverse reactions and contraindications, but it is not recommended for those who are allergic to the drug. Mealybugs can be used to treat croup, the main way is to make pills, or soaked in wine, the specific dosage and the way of medication should be in accordance with the guidance of the doctor to operate, not to take medication.