Dandelion is usually washed and stored dry. Dandelion is the dried whole herb of dandelion, alkali dandelion or several species of the same genus in the family of Asteraceae. It is bitter, sweet and cold in nature, and belongs to the liver and stomach meridians. It has the effects of clearing heat and removing toxins, subduing swellings and dispersing lumps, and inducing diuresis and diaphoresis (to improve the problem of dribbling in urine and the problem of small and inaccessible volume of urine). Dandelion is used for furuncles and poisons, breast carbuncle, scrofula (mainly refers to cervical lymph node tuberculosis), eye redness, sore throat, lung carbuncle, intestinal carbuncle (carbuncle occurring in the bowels of the intestinal organs, manifested by fever, pain in the right abdomen, and palpable lumps), damp-heat jaundice, feverish gonorrhea (burning and stinging pain is obvious during urination, accompanied by frequent urination and urgent urination, and discomfort from traction on the lower abdomen) astringent pain. Dandelion concoction method is to remove impurities, wash, cut, dry. Storage method is placed in a ventilated dry place, moisture-proof, moth-proof. The adverse effects and contraindications of the drug are not clear. If there is a need for medication, it is recommended that it be used under the guidance of a professional physician, not blindly self-medication.