Aster can be eaten. Aster is a traditional Chinese medicine, for the Asteraceae aster plant aster roots and rhizomes, its taste bitter, pungent, sweet, slightly warm, with moistening the lungs to resolve phlegm cough effect, can be used to treat cough with phlegm, lung carbuncle, chest paralysis (chest tightness and pain), urinary incontinence and other conditions. Aster is often used clinically in combination with other drugs, such as with thorns, can be used for wind-cold lung, cough and asthma; with the hundred parts of the combination, suitable for all kinds of cough without phlegm or with phlegm. The use of Aster is mainly for decoction of soup for internal use, or into the pill, loose to take. The adverse reactions of this product are not clear at present. Note that the use of this product is prohibited for those who are allergic to this product, allergic individuals need to be cautious in taking, Yin deficiency dry cough should be taken with caution. If you need to use this product, you should be under the guidance of a physician to identify the evidence, do not blindly use your own medicine, so as not to cause adverse reactions.