Clinical Study of Lung-benefiting Moxibustion Reduce Exacerbations of Asthma

Inclusion Criteria: * Patients who meet the diagnosis of asthma (remission); * Patients with poor clinical control; * Age 18-80 years old; * Voluntarily undergo treatment and sign an informed consent form; Exclusion Criteria: * Patients combined with pulmonary abscess, pulmonary fibrosis, active pulmonary tuberculosis, bronchiectasis or other lung diseases; * Patients with severe cardiovascular and cerebrovascular diseases (malignant arrhythmia, unstable angina pectoris, acute myocardial infarction, cardiac functional classification≥III, stroke, cerebral hemorrhage, etc.)； * Patients with severe liver diseases (liver cirrhosis, portal hypertension, bleeding due to esophageal and gastric varices, etc.) or severe kidney diseases (renal dialysis, kidney transplantation, etc.)； * Patients with confusion, various mental disorders, etc., who are unable to communicate normally; * Pregnant and lactating women; * Patients with heat phlegm pattern through TCM pattern differentiation； * Patients participating in other clinical trials within 1 month prior to enrollment; * Received TCM external treatment such as lung-benefiting moxibustion for 1 year; * Patients allergic to moxibustion drugs, smoke, etc.