There is no information yet that dandelion contains aristolochic acid. Dandelion is a kind of traditional Chinese medicine, which is the dried whole herb of dandelion, alkali dandelion or several species of the same genus in the family of Asteraceae; its taste is bitter, sweet and cold; it belongs to the liver and stomach meridians; its effects are to clear away heat and detoxify the toxin (to clear away heat and poisonous evils in the body), to reduce swelling and dissipate lumps, and to diuretic and diaphoretic (to improve the problem of drenching of urine, and the problem of small and incomprehensible amount of urine). Dandelion can be used in the treatment of carbuncle and furuncle (a skin disease referring to furuncles of severe degree), breast carbuncle (equivalent to mastitis in Western medicine), lung carbuncle (equivalent to lung abscess in Western medicine), intestinal carbuncle (carbuncle occurring in the intestines and bowels, manifested by fever, pain in the right side of the abdomen, and palpable lumps), jaundice with dampness-heat, and swollen and painful redness of the eyes. The nature of the drug is cold, overdose can lead to diarrhea; non-solid heat of the evidence and yin deficiency should be cautious to take dandelion. Dandelion should be used under the guidance of a professional Chinese medicine practitioner, and should not be used blindly on its own to avoid adverse reactions.