Aster is a traditional Chinese medicine, which mainly has the effects of moistening the lungs and lowering the qi (moisturizing the lungs and making the upward lung qi descend), resolving phlegm and relieving cough, and can be used in the treatment of new and prolonged coughs, phlegm and wheezing coughs and other illnesses, but it should be used with caution in cases of yin deficiency and dry coughs. The “Collected Notes on the Classic of Materia Medica” and the “Newly Revised Materia Medica” record the contraindications of Chinese herbal medicine as evil Tianxiong, Qu Mai, Lei Puan, Yuan Zhi, Ligusticum, and fear of Yin Chen Artemisia. Aster is the dried root and rhizome of Asteraceae, which is mainly used to moisten the lungs and lower the qi, dissolve phlegm and stop coughing, and can be used for the treatment of new and prolonged cough, phlegm and wheezing cough and coughing up blood from labor and coughing. Aster is bitter in flavor and warm in nature, which can deplete fluid, so it should be used with caution for those with dry coughs due to deficiency of yin. Aster can be decocted soup for internal use, can also be into the pill, loose, and clinical use of often with the winter flowers, Platycodon grandiflorus, thorns and other Chinese herbs, the specific use of the physician’s diagnosis should be carried out under the guidance of the doctor, do not blindly self-medicinal use of Chinese herbs.